Effect of Ni Content on the Formability and Microstructure of W-Ni Alloy by Laser Additive Manufacturing
Author of the article:WEI Yiyun;XU Qingdong;LE Guomin
Author's Workplace：Institute of Materials,China Academy of Engineering Physics,Mianyang 621908,China
Key Words：W-Ni alloy Ni content microstructure formability hardness
Abstract：The formability,microstructure and hardness of W-Ni alloy were studied by mixed element method.The results show that W-Ni alloy with Ni content of more than 20%can be deposited stably,the cross section width of the sedimentary layer changes little,and the formability is better.When the Ni content is less than 10%,the cross-section width gradually Narrows after multi-layer deposition,presenting a triangular shape and poor formability.With the decrease of Ni content,the density of W particles in W-Ni alloy structure also increases gradually,and there are more W particles at the bottom of the sample.With the decrease of Ni content,the hardness of the deposition area gradually increased,and along the direction of deposition,the microhardness from the substrate to the top of the deposition area show a trend of decreasing at first and then rising rapidly to slowly.
