( 1. 西安理工大学电子工程系， 西安 710048；
2. 西北稀有金属材料研究院，石嘴山 753000；
3. 中南大学 粉末冶金国家重点实验室， 长沙 410083)
摘 要: 为研究金属铍的微屈服行为，通过透射电镜观察了1×10-6、 50×10-6和200×10-6 3种不同微屈服阶段材料位错的变化， 初探了铍的微屈服机理。通过130多个铍试样的微屈服强度与屈服强度的比较试验证明，用常规简单的屈服强度试验代替冗长的微屈服强度试验是可能的。
关键字: 铍； 微屈服强度； 位错； 屈服强度
（ 1. Department of Electronic Engineering，
Xi’an Technology University， Xi’an 710048， China；
2. Northwest Rare Metal Materials Research Institute， Shizuishan 753000， China；
3. State Key Laboratory for Powder Metallurgy，
Central South University， Changsha 410083， China）
Abstract: In order to study the micro-yield behavior of beryllium metal, the dislocation changes of the material were observed at three kinds of micro-yield region with strain of 1×10-6，50×10-6 and 200×10-6 by TEM and the micro-yield mechanism of beryllium was approached. Through comparison between the micro-yield strength value of and the corresponding yield strength value of more than 130 samples, it is shown that the tedious micro-yield tests can be replaced by common and simple yield tests.
Key words: beryllium; micro-yield strength; dislocation; yield strength
