Solidification and microstructural aspects of laser-deposited Ni–Mo–Cr–Si alloy on stainless steel

Pramana

Santosh Kumar¹  Reena Awasthi1¹  D Srivastava¹  G K Dey¹ 

[1]Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$

关键词: Laser cladding;    microstructure;    Ni–Mo–Cr–Si alloy.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Laser cladding of stainless steel substrate was carried out using Ni–32Mo–15Cr–3Si (wt%) alloy powder. Laser cladding parameters were optimized to obtain defect-free and metallurgically bonded clad. Variation in solidification rate, cooling rate and compositional variation resulted in heterogeneous microstructure. Microstructure was found to be distinctly different in regions of clad cross-section. Majority of the region was found to consist of eutectic of Mo-rich hcp intermetallic Laves phase and NiFe fcc gamma solid solution phases. Extensive microstructural examinations of different clad regions have been carried out using microscopy and microanalysis techniques.

【 授权许可】

Unknown