TiAl基合金显微组织与室温断裂韧性关系的研究

• 作 者: 刘文胜 黄伯云 贺跃辉 周科朝 曲选辉
• 机 构: 中南工业大学
• 出 处: 稀有金属
• 发表日期: 1997年01期
• 关键词: TiAl 显微组织 断裂韧性 双态组织 试样尺寸 晶粒尺寸 断裂应变 层片 塑性区尺寸 γ相

分别测试了具有不同显微组织的Ｔｉ３３Ａｌ３Ｃｒ０．５Ｍｏ（ｗｔ％）合金的室温断裂韧性，发现在晶粒尺寸相当的条件下，全层片组织合金试样的断裂韧性最高，双态组织最低。这主要归因于全层片组织能够较好地调节应变不协调性，从而使断裂应变提高，塑性区扩大

The room temperature fracture toughness of Ti33Al3Cr0.5Mo (wt%) alloys with different microstructures were tested respectively. It was found that the fracture toughness of the fulllayer specimen was the highest under the same grain size, Binary state lowest. This is mainly attributed to the fact that the full-layer structure can better adjust the strain incompatibility, thereby increasing the fracture strain and expanding the plastic zone