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学者姓名：崔丽
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Abstract ：
Two different thicknesses of CuCrZr plates combined with laser deposited V layer were designed as a composite intermediate layer to laser welding of TC4 alloy to 304 stainless steel (SS). The effect of different thicknesses of CuCrZr plates on microstructure and mechanical properties of Ti/steel welded joint was investigated. The results show that a sound Ti/steel joint with full penetration has been successfully achieved using the prepared composite interlayer. When the thickness of CuCrZr plates was increased to 1 mm from 0.5 mm, an unmelted CuCrZr zone was observed, which hindered the diffusion of Fe and V elements. A small amount of clustered FeV intermetallic compounds (IMCs) were found in fusion zone (FZ) with 0.5-mm-thick CuCrZr plates; however, no sign of IMCs formation was observed in FZs using 1-mm-thick CuCrZr plates. Compared to 0.5-mm-thick CuCrZr plates, the application of 1-mm-thick CuCrZr plates resulted in a more uniform hardness distribution of the FZs, as well as stronger ultimate tensile strength (415 MPa) and elongation (5.2%). In addition, the most important feature was that the fracture of the joint with 1-mm-thick CuCrZr plates occurred in the unmelted CuCrZr zone rather than in the FZs.
Keyword ：
Titanium alloys Titanium alloys Dissimilar materials joining Dissimilar materials joining Laser melting deposition Laser melting deposition Laser beam welding Laser beam welding Stainless steel Stainless steel
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| GB/T 7714 | Shi, Zhenfu , Cui, Li , He, Dingyong et al. Effect of CuCrZr interlayer thickness on microstructure and mechanical properties of TC4/304 SS joint using CuCrZr/V composite layers [J]. | WELDING IN THE WORLD , 2025 . |
| MLA | Shi, Zhenfu et al. "Effect of CuCrZr interlayer thickness on microstructure and mechanical properties of TC4/304 SS joint using CuCrZr/V composite layers" . | WELDING IN THE WORLD (2025) . |
| APA | Shi, Zhenfu , Cui, Li , He, Dingyong , Li, Huachen , Huang, Zhekai , Cao, Qing et al. Effect of CuCrZr interlayer thickness on microstructure and mechanical properties of TC4/304 SS joint using CuCrZr/V composite layers . | WELDING IN THE WORLD , 2025 . |
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Abstract ：
Welding of AlSi10Mg alloys fabricated by additive manufacturing (AM) has been recently conducted to meet the demands for joining or repairing them. However, high susceptibility to porosity occurring in weld metal (WM) poses a significant challenge for fusion welding of AM AlSi10Mg alloys. The laser metal deposition (LMD) process has emerged as a promising welding solution due to its low dilution rate for reducing the porosity. In this study, LMD welding of AM AlSi10Mg alloys was carried out employing different heat inputs with five and eight tracks. The study systematically assessed the impact of heat input on porosity, microstructure, and mechanical properties of the welded joints. The results show that the decrease of heat input from 180 to 75 J/mm results in a substantial reduction in porosity from 7.0 to 2.1%. This reduction leads to a 29.4% increase in ultimate tensile strength (UTS) and an 11.7% increase in elongation index (EI). Furthermore, the upper region of joints with eight tracks possessing low heat input displays lower porosity and superior mechanical properties than the bottom region with relatively high heat input. The WM with eight tracks exhibits refined alpha-Al cells and Si-rich eutectic phases, improved connectivity of Si-rich networks, and increased solid solution strengthening, compared to the five-track joints with higher heat input. As a result, low heat input of the upper region in the LMD welded joints has been effective in minimizing hydrogen pores, enhancing WM microstructure, and improving the mechanical properties of welded joints in AM AlSi10Mg alloys.
Keyword ：
Porosity Porosity Microstructure Microstructure LMD welding LMD welding LPBF AlSi10Mg alloys LPBF AlSi10Mg alloys Mechanical properties Mechanical properties
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| GB/T 7714 | Li, Jingchuan , Cui, Li , Wu, Defan et al. Welding of additive manufacturing AlSi10Mg alloys using a laser metal deposition process with different heat inputs [J]. | WELDING IN THE WORLD , 2024 , 68 (8) : 2083-2101 . |
| MLA | Li, Jingchuan et al. "Welding of additive manufacturing AlSi10Mg alloys using a laser metal deposition process with different heat inputs" . | WELDING IN THE WORLD 68 . 8 (2024) : 2083-2101 . |
| APA | Li, Jingchuan , Cui, Li , Wu, Defan , Wang, Can , Shi, Zhenfu , He, Dingyong et al. Welding of additive manufacturing AlSi10Mg alloys using a laser metal deposition process with different heat inputs . | WELDING IN THE WORLD , 2024 , 68 (8) , 2083-2101 . |
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Abstract ：
Laser metal deposition of pure vanadium (V) powder was conducted on TC4 alloys base material to produce an in situ V/Cu composite interlayer for dissimilar welding of 304 stainless steels to TC4 alloys. A sound TC4/304 SS joint is obtained using the prepared V/Cu composite interlayers. The microstructure, microhardness, and tensile properties of the TC4/304 SS joints were investigated. (beta-Ti, V), (V), and (Cu) solid solutions are found in the fusion zone near the TC4 alloy side, and (Cu) and (gamma-Fe) solid solutions are observed in the fusion zone near the 304 SS side. The maximum ultimate tensile strength of 421 MPa and an elongation at fracture of 4.5% are obtained in the TC4/304 SS joints among the three tensile specimens. The fracture of the welded joints occurs in the heat-affected zone of the unmelted CuCrZr zone instead of the fusion zones due to the coarsening grains. The "bite" connection between FZ1 and CuCrZr plays an important role in improving the tensile strength of the welded joint.
Keyword ：
stainless steel stainless steel laser melting deposition laser melting deposition vanadium vanadium laser beam welding laser beam welding CuCrZr CuCrZr titanium alloys titanium alloys dissimilar materials dissimilar materials
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| GB/T 7714 | Shi, Zhenfu , Cui, Li , He, Dingyong et al. Dissimilar Joining of TC4 Alloys to 304 Stainless Steels Using a Novel V/CuCrZr Composite Interlayer [J]. | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2024 . |
| MLA | Shi, Zhenfu et al. "Dissimilar Joining of TC4 Alloys to 304 Stainless Steels Using a Novel V/CuCrZr Composite Interlayer" . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE (2024) . |
| APA | Shi, Zhenfu , Cui, Li , He, Dingyong , Li, Huachen , Huang, Zhekai , Cao, Qing et al. Dissimilar Joining of TC4 Alloys to 304 Stainless Steels Using a Novel V/CuCrZr Composite Interlayer . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2024 . |
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Abstract ：
In order to study the effect of non-contact ultrasonic-assisted laser metal deposition (LMD) on microcracks, Febased powders were deposited on a 42CrMoA steel using LMD process at different excitation distances (d). The results show that the maximum length of microcracks is 112.3 mu m under the condition without ultrasonicassisted. When d = 50 mm, a crack of less than 10 mu m is generated at the bottom of deposition layer. When d = 110 mm, the microcrack maximum length is 84.4 mu m. The deposition layer with no microcracks was obtained when d = 80 mm. Ultrasonic-assisted application can synergically inhibit the generation of cracks from two aspects. On the one hand, it makes the distribution of B element more uniform in the molten pool, and the accumulation of borides at the bottom of the deposition layer easily generates hard and brittle borides such as M23(C,B)6, which is more likely to induce cracks. After non-contact ultrasonic-assisted, the width of boride is 54.2 % lower than that without ultrasonic-assisted, and the boride morphology is slightly different. The borides changed from long rod-shape and mesh-shape to nanoscale short rod-shape and granular-shape. On the other hand, it can make the microscopic stress distribution at the bottom of deposition layer more uniform, which reduces the crack sensitivity. Compared to the condition without ultrasonic-assisted, when d is 50 mm, 80 mm and 110 mm, the KAM average value decreased by 44.03 %, 40.36 % and 19.27 %, respectively.
Keyword ：
Non-contact Ultrasonic-assisted (UVA) Non-contact Ultrasonic-assisted (UVA) Laser metal deposition (LMD) Laser metal deposition (LMD) Fe-based powder Fe-based powder Impact toughness Impact toughness Crack inhibition mechanism Crack inhibition mechanism
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| GB/T 7714 | Li, Huachen , Cui, Li , He, Dingyong et al. Effect of ultrasonic-assisted laser metal deposition on microcracks in deposition layer [J]. | OPTICS AND LASER TECHNOLOGY , 2024 , 181 . |
| MLA | Li, Huachen et al. "Effect of ultrasonic-assisted laser metal deposition on microcracks in deposition layer" . | OPTICS AND LASER TECHNOLOGY 181 (2024) . |
| APA | Li, Huachen , Cui, Li , He, Dingyong , Shi, Zhenfu , Bu, Fanhui , Cao, Qing et al. Effect of ultrasonic-assisted laser metal deposition on microcracks in deposition layer . | OPTICS AND LASER TECHNOLOGY , 2024 , 181 . |
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Abstract ：
Cold Metal Transfer (CMT) welding was performed on laser powder bed fusion (L-PBF) AlSi10Mg alloys using ER5183 and ER5356 Al-Mg filler wires. The effects of the ER5183 wire on the porosity, microstructure, and mechanical properties of the welded joints and weld metal (WM) were compared with those of the ER5356 wire. The results show that the porosity and pore size in the WM produced with the ER5183 wire are reduced relative to those in the WM produced with the ER5356 wire. The ultimate tensile strength (UTS) of the welded joints made with ER5183 and ER5356 wires is 224.5 and 222.6 MPa, respectively, reflecting a similarly reduced UTS compared to the base metal (BM). Fractures in the welded joints occur in the non-dendritic equiaxed zone (EQZ), which may be attributed to the enhanced heterogeneous nucleation of Al3Ti particles, facilitated by the increased Ti content from both the BM and the filler wires. Additionally, the WM, excluding the EQZ, shows UTS values of 267.6 and 238.4 MPa for the ER5183 and ER5356 wires, respectively. These findings suggest that the WM produced with ER5183 wire exhibits a significantly higher UTS compared to that produced with ER5356 wire. This enhancement can be attributed to factors such as increased solid solution strengthening, grain boundary strengthening, texture strengthening, the presence of nanosized Si precipitates and Si network boundaries, and the load transfer effects of the Si-rich networks. Moreover, the UTS of the WM with the ER5183 wire is 19.2 pct higher than that of the corresponding welded joint.
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| GB/T 7714 | Cui, Li , Wu, Defan , Ma, Lixia et al. Effect of Al-Mg Filler Wires on Weldability of Cold Metal Transfer Welded AlSi10Mg Alloys Fabricated Using Laser Powder Bed Fusion [J]. | METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE , 2024 , 56 (3) : 840-864 . |
| MLA | Cui, Li et al. "Effect of Al-Mg Filler Wires on Weldability of Cold Metal Transfer Welded AlSi10Mg Alloys Fabricated Using Laser Powder Bed Fusion" . | METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 56 . 3 (2024) : 840-864 . |
| APA | Cui, Li , Wu, Defan , Ma, Lixia , Qiao, Jiutong , Wu, Xu , He, Dingyong . Effect of Al-Mg Filler Wires on Weldability of Cold Metal Transfer Welded AlSi10Mg Alloys Fabricated Using Laser Powder Bed Fusion . | METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE , 2024 , 56 (3) , 840-864 . |
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Abstract ：
一种电弧增材制造高强Al‑Mg系合金成形件的方法，涉及铝合金增材制造领域。电弧增材制造(WAAM)工艺制备Al‑Mg系合金越来越受到广泛的关注，但目前已有的WAAM工艺制备Al‑Mg系合金强度不高，绝大部分无法达到工业使用的需求。本专利采用熔化极惰性气体保护(MIG)增材制造系统，以高镁焊丝(Mg 5.5～6.8wt％，Zr≤0.1wt％)为丝材，采用单道摆动的方式往复式逐层沉积成形，调控焊接工艺参数，获得成形优良的高强Al‑Mg系铝合金成形件，抗拉强度最高达365.0MPa，断后延伸率为25.5％，具有优良的强度和塑性结合。
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| GB/T 7714 | 崔丽 , 翟利民 , 贺定勇 et al. 一种电弧增材制造高强Al-Mg系合金成形件的方法 : CN202310211381.7[P]. | 2023-02-27 . |
| MLA | 崔丽 et al. "一种电弧增材制造高强Al-Mg系合金成形件的方法" : CN202310211381.7. | 2023-02-27 . |
| APA | 崔丽 , 翟利民 , 贺定勇 , 黄晖 , 魏午 . 一种电弧增材制造高强Al-Mg系合金成形件的方法 : CN202310211381.7. | 2023-02-27 . |
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Abstract ：
本发明公开了一种竹笋结构W‑Zr基非晶合金复合材料及其制备方法与应用，涉及金属复合材料技术领域，复合材料的整体结构上分别存在硬脆区和软韧区，其中硬脆区体积分数为10％～30％，软韧区体积分数为70％～90％，两区域呈锥形交替分布，其分布为仿生竹笋结构，这种竹笋结构的优势在于：在高应变速率条件下，软韧区先发生变形，随着变形程度增加，软韧区与硬脆区同时变形，随后硬脆区开裂，沿着设计结构方式分离脱落，重新露出尖锐区域完成自锐化，类似竹笋剥落；循环此步骤，完成侵彻过程，可显著增加穿甲弹威力。
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| GB/T 7714 | 谈震 , 席钊 , 宁子阳 et al. 一种竹笋结构W-Zr基非晶合金复合材料及其制备方法与应用 : CN202310055654.3[P]. | 2023-01-17 . |
| MLA | 谈震 et al. "一种竹笋结构W-Zr基非晶合金复合材料及其制备方法与应用" : CN202310055654.3. | 2023-01-17 . |
| APA | 谈震 , 席钊 , 宁子阳 , 贺定勇 , 周正 , 郭星晔 et al. 一种竹笋结构W-Zr基非晶合金复合材料及其制备方法与应用 : CN202310055654.3. | 2023-01-17 . |
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Abstract ：
本发明涉及一种具有钨骨架结构的钨铜复合材料微通道散热器及其制备方法，涉及增材制造技术及微通道散热技术领域。本发明利用激光增材制造技术，按照所设计微通道结构的模型进行切片处理、区域划分及激光扫描策略规划，通过不同区域的激光工艺参数、激光扫描策略与钨铜粉末比例匹配，一体成形制备出具有钨骨架结构的钨铜复合材料微通道散热器，随后对微通道进行磨粒流抛光后处理，使微通道具有适宜的内表面粗糙度。所制备的微通道散热器散热性能优良，热膨胀系数能与电子元件的基体材料相匹配，钨骨架显著改善散热器高温性能并实现结构功能一体化，为微电子领域提供更有效率、成本更低的散热解决方案。
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| GB/T 7714 | 贺定勇 , 李小璇 , 谈震 et al. 一种具有钨骨架结构的钨铜复合材料微通道散热器及其制备方法 : CN202310249027.3[P]. | 2023-03-15 . |
| MLA | 贺定勇 et al. "一种具有钨骨架结构的钨铜复合材料微通道散热器及其制备方法" : CN202310249027.3. | 2023-03-15 . |
| APA | 贺定勇 , 李小璇 , 谈震 , 郭星晔 , 邵蔚 , 周正 et al. 一种具有钨骨架结构的钨铜复合材料微通道散热器及其制备方法 : CN202310249027.3. | 2023-03-15 . |
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Abstract ：
The additive manufactured (AM) parts of aluminum alloys have been widely used in defense, aerospace, automotive and other industries. There is a growing demand for joining or repairing of the AM parts of aluminum alloys using welding technology. However, the problems of high porosity and joint softening are occurred when welding of aluminum alloy AM parts, which have become technical bottlenecks that need to be solved urgently. Laser welding of AlSi10Mg alloys fabricated by selective laser melting (SLM) with an addition of Er and Zr in the filler metal was carried out. The effect of Er and Zr addition on the porosity, microstructures and mechanical properties of the welded joints was investigated, and the contribute of Er and Zr addition to the yield strength (YS) of the welded joints was calculated. Compared that joints without Er and Zr addition, the average ultimate tensile strength (UTS) and YS of the welded joints with Er and Zr addition have been increased by 10.5% and 23.5%, respectively. The improved mechanical poverty of the welded joints is due to the refined alpha-Al grains and Si-rich cellular networks, and the reduced hydrogen pores occurred in the weld metal (WM) with the addition of Er and Zr. The YS calculation of the weld joints indicates the most important contribution to the YS is the enhancement effect of the Si-rich networks with Er and Zr.
Keyword ：
Weldability Weldability Er and Zr addition Er and Zr addition SLM AlSi10Mg alloys SLM AlSi10Mg alloys Laser welding Laser welding
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| GB/T 7714 | Peng, Zhibo , Cui, Li , He, Dingyong et al. Effect of Er and Zr addition on laser weldability of AlSi10Mg alloys fabricated by selective laser melting [J]. | MATERIALS CHARACTERIZATION , 2022 , 190 . |
| MLA | Peng, Zhibo et al. "Effect of Er and Zr addition on laser weldability of AlSi10Mg alloys fabricated by selective laser melting" . | MATERIALS CHARACTERIZATION 190 (2022) . |
| APA | Peng, Zhibo , Cui, Li , He, Dingyong , Guo, Xingye , Zeng, Yong , Cao, Qing et al. Effect of Er and Zr addition on laser weldability of AlSi10Mg alloys fabricated by selective laser melting . | MATERIALS CHARACTERIZATION , 2022 , 190 . |
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Abstract ：
The welding process has been recently introduced to join of the materials fabricated by powder bed fusion (PBF) additive manufacturing (AM) to meet the requirement for the large parts and their repair in service. However, one of the main issues is the high susceptibility to the hydrogen pores occurred during fusion welding of the PBF aluminum (Al) alloys. Autogenous laser welding of a selective laser melting (SLM) AlSi10Mg alloy was firstly carried out in comparison with the casting AlSi10Mg alloy to examine the hydrogen pore characteristics. Singlepass welding with filler powders and laser melting deposition (LMD) welding were then performed on SLM AlSi10Mg alloys to reduce the hydrogen pores. The porosity, microstructure, microhardness and tensile property of the welded joints were investigated. As a result, a high susceptibility to hydrogen pores of SLM AlSi10Mg alloys is occurred in the weld metal (WM) of the welded joint produced by autogenous laser welding and singlepass laser welding due to the high hydrogen content pre-existing in the base metal (BM). However, LMD welding has been shown to effectively reduce the pore size and the porosity generated in the WM of SLM AlSi10Mg alloys. The laser welding of SLM AlSi10Mg alloys produces lower hardness and ultimate tensile strength (UTS) than that of the BM. However, the LMD welding of SLM AlSi10Mg alloys achieves higher hardness and UTS than those of the autogenous laser welding and single-pass laser welding, which is attributed to the refined microstructures and the reduced hydrogen pores in the WM.
Keyword ：
Single-pass laser welding Single-pass laser welding Hydrogen pores Hydrogen pores Laser melting deposition (LMD) welding Laser melting deposition (LMD) welding Mechanical properties Mechanical properties SLM AlSi10Mg alloys SLM AlSi10Mg alloys Microstructures Microstructures
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| GB/T 7714 | Cui, Li , Peng, Zhibo , Chang, Yaoqing et al. Porosity, microstructure and mechanical property of welded joints produced by different laser welding processes in selective laser melting AlSi10Mg alloys [J]. | OPTICS AND LASER TECHNOLOGY , 2022 , 150 . |
| MLA | Cui, Li et al. "Porosity, microstructure and mechanical property of welded joints produced by different laser welding processes in selective laser melting AlSi10Mg alloys" . | OPTICS AND LASER TECHNOLOGY 150 (2022) . |
| APA | Cui, Li , Peng, Zhibo , Chang, Yaoqing , He, Dingyong , Cao, Qing , Guo, Xingye et al. Porosity, microstructure and mechanical property of welded joints produced by different laser welding processes in selective laser melting AlSi10Mg alloys . | OPTICS AND LASER TECHNOLOGY , 2022 , 150 . |
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