摘要
考虑到高温下的应用,对WCu合金及钨骨架施加热压缩载荷,分析不同温度及应变速率下WCu合金的组织及力学行为。结果表明:WCu合金的应力-应变行为主要取决于温度的变化,热压缩后组织内大部分烧结颈消失,WCu合金在300℃的热压缩下出现明显的塑性流,而在900℃下钨颗粒基本均匀分布。另外,高应变速率下钨骨架的强度有所减小,不同应变速率下的钨颗粒出现光滑的晶粒及开裂。
Considering the application of WCu alloy at elevated temperature, hot compression was applied on WCu alloy and W skeleton to analyze the microstructure and mechanical behaviors at different temperatures and strain rates. The results show that the stress-strain behavior of WCu alloy is affected mainly by the temperature. The sintering necks disappear mostly after hot compression. The plastic flow of WCu alloy appears at 300 ℃ while W particles are mostly homogeneous approximately at 900 ℃. In addition, the strength of W skeleton declines slightly at high strain rate, while round grains and cracking appear at the substructure of W particle under different strain rates.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第9期2258-2262,共5页
Rare Metal Materials and Engineering
基金
National High-Tech Research and Development Program of China("863"program)(2015AA034304)
Pivot Innovation Team of Shaanxi Electric Materials and Infiltration Technique(2012KCT-25)
Special Foundation of Shaanxi Provincial Education Department(14JK1312)
Shaanxi Provincial Natural Science Foundation(2015JM5228)
Dr.Scientific Research Foundation of Xi’an Polytechnic University(BS13015)
Discipline Construction of Xi’an Polytechnic University
关键词
WCu合金
钨骨架
热压缩
应力
组织
WCu alloy
W skeleton
hot compression
stress
microstructure
