热压缩下WCu合金的力学性能及组织（英文）

• 作 者: 王彦龙 王宝娥 吴沙沙 王俊勃 梁淑华
• 机 构: 西安工程大学,西藏民族学院,西安理工大学,
• 出 处: 稀有金属材料与工程
• 发表日期: 2016年09期
• 关键词: 热压缩 应变速率 tungsten 压缩载荷 力学性能 烧结颈 均匀分布 应力-应变 skeleton grains

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 under high temperature, the WCu alloy and the tungsten matrix were subjected to hot compressive loading, and the microstructures and mechanical behaviors of the WCu alloy at different temperatures and strain rates were analyzed. The results show that the stress-strain behavior of WCu alloy depends mainly on the change of temperature, and most of the sintering neck disappears after hot compression. WCu alloy shows obvious plastic flow under thermal compression at 300 ℃, The basic uniform distribution. In addition, the strength of the tungsten matrix decreases at high strain rates, and smooth grains and cracks appear in the tungsten particles at different strain rates.