WORK STRENGTHENING OF BIPHASE W-Ni-Fe ALLOYS AND THEIR MICROSTRUCTURE
ZHU Guisen; LIU Mingcheng; ZHEN Zhenxian (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry Beijing)
Cite this article:
ZHU Guisen; LIU Mingcheng; ZHEN Zhenxian (Central Iron and Steel Research Institute; Ministry of Metallurgical Industry Beijing). WORK STRENGTHENING OF BIPHASE W-Ni-Fe ALLOYS AND THEIR MICROSTRUCTURE. Acta Metall Sin, 1983, 19(6): 45-120.
Abstract The correlation among the percentage reduction, mechanical properties and microstructure of 3 biphase W-Ni-Fe alloys swaged under lower temperature has been investigated. It was resulted that the strength and hardness of the alloys increase with the increase of their W contents. However, the alloys of higher W contents have no more strengthened under the reduction beyond 15%. The room temperature tensile strength and hardness may be increased about 50% if it is of 93% W. Their microstructure markedly shows that the W grains are elongated along the longitudinal working direction. The cleavage failure across W grains becomes the main mode of fracture and the slip bands can be observed on them. The deformation feature and the mechanism of these biphase W alloys have been also discussed. Furthermore, it is suggested that the superior mechnical properties as a whole of the alloys may be produced by the vacuum annealing at the temperature between 800—1200℃.
