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요약정보
ZL101A合金低温疲劳性能和断裂行为研究 / Low Temperature Fatigue Properties and Fracture Behavior of ZL101A
Resource Type
Academic Journal
Authors
马昌龙
;
宋丽英
;
郑黎
;
于宝义
;
李润霞
;
MA Chang-long
;
SONG Li-ying
;
ZHENG Li
;
YU Bao-yi
;
LI Run-xia
Source
铸造 / Foundry
. 69(5):461-468
Subject
ZL101A铝合金
低温疲劳性能
疲劳断口
断口粗糙度
Language
Chinese
ISSN
1001-4977
Online Access
Scopus
Find it @ DONGA
초록
研究了ZL101A合金的低温拉伸性能和低温疲劳性能,对断口形貌进行了观察,分析了疲劳断裂的微观机制.结果表明:服役温度对合金疲劳寿命及断裂机制有显著的影响.随着服役温度的降低,合金疲劳寿命提高.室温条件下断口主要以穿晶断裂为主,同时伴随局部沿晶断裂特征,而-40℃条件下合金断裂行为表现出较强的晶体学裂纹特征.与室温相比,合金在低温下的疲劳断口瞬断区面积增大,粗糙度有所升高.而相同温度下,合金随着应变幅的增加,合金低温疲劳的断口粗糙度有所降低.
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