Laser cladding Ni/Ni3Al based double performance materials and internal microstructure analysis - Details

Author：

Yang, Jiaoxi (Yang, Jiaoxi.) (Scholars：杨胶溪) | Wang, Yanfang (Wang, Yanfang.) | Wang, Zhicheng (Wang, Zhicheng.)

Indexed by：

EI Scopus PKU CSCD

Abstract：

Ni/Ni3Al　double　performance　coatings　with　good　metallurgical　quality　are　obtained　through　optimizing　the　process　parameters　and　using　multi-laser　cladding.　Double　performance　materials　crack-sensitivity　can　be　reduced　effectively　by　changing　the　laser　processing　parameters.　The　generation　and　mechanism　of　cracks　in　the　laser　processing　are　investigated.　The　microstructure,　composition　and　phase　constitution　of　the　coatings　are　characterized　using　scaming　electron　microscope　(SEM),　X-ray　diffrcaction　(XRD),　respectively.　The　results　reveal　that　small　amount　phases　of　Al8Cr5　and　Al4CrNi15　are　precipitated　in　the　single　clad　coating　due　to　the　dilution　of　Nibased　alloy.　Additionally,　a　single　Ni3Al　phase　is　produced　in　the　coating　by　means　of　multilayer　cladding,　which　can　keep　good　properties　of　Ni3Al-based　materials　and　perform　the　characteristics　of　double-properties　materials　more　sufficiently.　The　micro-hardness　testing　of　the　coatings　show　that　the　double-properties　material　is　able　to　maintain　high　hardness　even　under　higher　temperature.　©,　2015,　Science　Press.　All　right　reserved.

Keyword：

Ternary alloys Binary alloys Laser cladding Cladding (coating) Aluminum alloys Microhardness Laser materials processing Nickel compounds Microstructure Chromium alloys Coatings

Author Community：

[ 1 ] [Yang, Jiaoxi]Institute of Laser Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Wang, Yanfang]Institute of Laser Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Wang, Zhicheng]Institute of Laser Engineering, Beijing University of Technology, Beijing; 100124, China