Effect of Element Addition on the Microstructure and Mechanical Properties of Two-Step Sintered W-6Ni-4Co Alloy AITranslate

2Wei Fan,Yan Zhuge,Xing Ma,Christopher W.K.Chow,Yue Liu,Guangtong Huang,Nima Gorjian.Effects of carbonation on mechanical properties of CAC‑GGBFS blended strain hardening cementitious composites[J].Low-carbon Materials and Green Construction,2023,1(1):3-20.

Basic Information:

DOI：

Chinese Library Classification Number:TG146.411[金属学及工艺—金属材料]

Citation Information:

The W-6Ni-4Co-2X alloys(X=Nb,Ta,Hf,Mo and Ti)were prepared by powder metallurgy technology,and the effects of adding Nb,Ta,Hf,Mo,and Ti elements on the microstructure and mechanical properties of W-6Ni-4Co alloy were investigated.The results show that the microstructure of the W-6Ni-4Co-2X alloys mainly includes base phase(W phase)and binder phase,and the type and content of the binder phase are related to the precipitation of dissolved W phase in the binder phase(Ni,Co)during sintering.The W grains of W-6Ni-4Co-2Ta alloy and W-6Ni-4Co-2Hf alloy are in the form of irregular polygon,while the W grains of W-6Ni-4Co-2Nb alloy and W-6Ni-4Co-2Ti alloy are ellipsoidal and dispersedly distributed in the binder phase.The uniform microstructure,finer grains,and good interfacial bonding of the W/binder phase in W-6Ni-4Co-2Ta alloy contribute to its superior hardness,bending strength,and yield strength.In W-6Ni-4Co-2Mo alloy,W grains are arranged in network structure,and the continuous W ske-leton structure,in synergy with the ductile binder phase,reduces the strain hardening of the alloy,contributing to its excellent strain hardening resistance.Therefore,adding suitable transition metal elements to W-6Ni-4Co alloy provides an effective way for improving its mechanical properties.