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Author:

Ma, Shiyu (Ma, Shiyu.) | Lv, Xianzi (Lv, Xianzi.) | Zhang, Jianxin (Zhang, Jianxin.) | Zhang, Youjian (Zhang, Youjian.) | Li, Pan (Li, Pan.) | Jin, Huixin (Jin, Huixin.) | Zhang, Wenyang (Zhang, Wenyang.) | Li, Xueqiao (Li, Xueqiao.) | Mao, Shengcheng (Mao, Shengcheng.) (Scholars:毛圣成)

Indexed by:

EI Scopus SCIE

Abstract:

Misfit dislocation structures are investigated in a nickel-based single crystal superalloy subjected to 38.8 h creep at 1100 degrees C and 130 MPa using conventional and high resolution transmission electron microscopy (HRTEM). The misfit dislocation was identified as an uncommon one with Burgers vector b = a/2[(2) over bar 11], which can be described as inserting (or extracting) one (1 (1) over bar1) half plane and one (11 (1) over bar) half plane. This dislocation was decomposed into two partial dislocations b(1) and b(2), with b(1) = a/2[(1) over bar 01] and b(2) = a/2[(2) over bar 11]. Partial dislocations b(1) and b(2) were arranged in a "V" shape, connected by the antiphase boundary (APB), which could hinder the dislocation motion to achieve the effect of dislocation enhancement. (c) 2018 Elsevier B.V. All rights reserved.

Keyword:

Stress distribution Core structure High-temperature and low-stress creep Strengthening mechanism Nickel based superalloys Misfit dislocation

Author Community:

  • [ 1 ] [Ma, Shiyu]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 2 ] [Lv, Xianzi]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 3 ] [Zhang, Jianxin]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 4 ] [Zhang, Youjian]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 5 ] [Li, Pan]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 6 ] [Jin, Huixin]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 7 ] [Zhang, Wenyang]Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
  • [ 8 ] [Li, Xueqiao]Beijing Univ Technol, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100024, Peoples R China
  • [ 9 ] [Mao, Shengcheng]Beijing Univ Technol, Beijing Key Lab Microstruct & Property Adv Mat, Beijing 100024, Peoples R China

Reprint Author's Address:

  • [Zhang, Jianxin]Shandong Univ, Sch Mat Sci & Engn, 17923 Jingshi Rd, Jinan 250061, Shandong, Peoples R China

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Source :

JOURNAL OF ALLOYS AND COMPOUNDS

ISSN: 0925-8388

Year: 2018

Volume: 743

Page: 372-376

6 . 2 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:260

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count: 9

SCOPUS Cited Count: 11

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 9

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