TC21合金片层组织特征对其断裂韧性的影响

来源期刊：中国有色金属学报2010年第z1期(上册)

论文作者：党薇 薛祥义 李金山 胡锐 朱知寿 张丰收 周廉

文章页码：16 - 20

关键词：TC21钛合金；片层组织特征；断裂韧度

Key words：TC21 alloy; lamellar microstructure feature; fracture toughness

摘    要：研究TC21合金经β相区固溶并慢速冷却后的片层组织特征(晶界α层厚度、α片层宽度、α集束尺寸)及断裂韧度随冷却速率的变化规律，探讨片层组织特征与断裂韧度的关系。结果表明：随着冷却速率的增大，TC21合金α片层集束、α片层厚度及晶界α层宽度均减小。在本文实验测试尺度范围内，α片层宽度、α片层集束尺寸及晶界α层厚度的增大均可提高合金的断裂韧性。

Abstract: In order to analyze the relationship between lamellar microstructure feature (thickness of α laths, width of α lath at grain boundary and α colony size) and fracture toughness, the microstructures and fracture toughness of TC21 alloy cooled from β phase field with different slow rates were investigated. The results show that α colony size together with α laths thickness and width of α lath at grain boundary is decreased with increasing cooling rates, leading to the decrease of fracture toughness. It is positive for fracture toughness to decrease width of α lath at grain boundary, α laths thickness and α colony size.

基金信息：国家重点基础研究发展计划资助项目