摘要
用慢应变速率拉伸法研究了疲劳预形变以及拉伸预形变对纯钢在ＮａＮＯ２溶液中应力腐蚀敏感性的影响.结果表明，疲劳预形变（切应力幅γｐｌ＝１.２×１０－４，疲劳周次Ｎ＝８．４×１０４；以及γｐｌ＝９．４×１０－４； Ｎ＝２．４×１０４）能降低Ｃｕ单晶的应力腐蚀敏感性．随拉伸预形变量升高，纯铜多品的应力腐蚀敏感性也降低.这表明，预形变能改善纯铜的应力腐蚀性能．
Slow-strain-rate tests in NaNO2 solution were performed to determine the effect of cyclic and monotonic prestraining on the stress corrosion cracking (SCC) susceptibility of pure copper. The results showed that prestraining in fatigue (1= 1.2x 10-4, N=8.4x 104 and l=9.4x 10-4, N=2.4x104) decreased the SCC susceptibility of copper single crystals. Increasing monotonic prestraining increased SCC resistance of copper polycrystals. The results suggest that prestrain can improve the resistance to SCC of copper.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第2期161-164,共4页
Acta Metallurgica Sinica
基金
国家重点基础研究 G19990650
国家自然科学基金50071010
国家自然科学基金19891180
关键词
预形变
疲劳
应力腐蚀敏感性
纯铜
copper, prestrain, fatigue, SCC(stress corrosion cracking)
