( 1. 西安理工大學(xué)電子工程系， 西安 710048；
2. 西北稀有金屬材料研究院，石嘴山 753000；
3. 中南大學(xué) 粉末冶金國家重點實驗室， 長沙 410083)
摘 要: 為研究金屬鈹?shù)奈⑶袨椋ㄟ^透射電鏡觀察了1×10-6、 50×10-6和200×10-6 3種不同微屈服階段材料位錯的變化， 初探了鈹?shù)奈⑶䴔C理。通過130多個鈹試樣的微屈服強度與屈服強度的比較試驗證明，用常規(guī)簡單的屈服強度試驗代替冗長的微屈服強度試驗是可能的。
關(guān)鍵字: 鈹； 微屈服強度； 位錯； 屈服強度
（ 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
