Hardness variations during aging process of deformed W-Ni-Fe ternary alloys with high nickel-to-iron ratios

Ronghua Li, Jihua Huang, Sheng Yin, and Jun ZhaoSchool of Mechanical, Electronic and Control Engineering, Northern Jiaotong University, Beijing 100044, ChinaMaterials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China

摘 要：<正> The aging precipitation behavior of P phase in two kinds of alloys with 7/3 and 9/1 nickel-to-iron ratios during aging at 800℃ after deformation was studied. The results show that there are two different kinds of aging hardness variation mechanisms （the softening mechanism and the hardening mechanism） deciding the hardness variations of the alloys. When Ni/Fe is smaller than 8/2, there is only the softening mechanism which results from the decreasing of dislocation density and recovery or re-crystallization. And when Ni/Fe is greater than 8/2 besides the softening mechanism there is still the hardening mechanism that is induced by the precipitation of P phase.

关键词：