室温大气环境下过时效态3J21合金疲劳行为

金晓鸥; 刘洪波; 何世禹; 张晶

doi:10.19515/j.cnki.1003-1545.2011.04.004

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名

邮箱

手机号码

标题

留言内容

验证码

室温大气环境下过时效态3J21合金疲劳行为

doi: 10.19515/j.cnki.1003-1545.2011.04.004

1. 黑龙江大学建筑工程学院, 黑龙江哈尔滨 150080;
2. 哈尔滨工业大学材料科学与工程学院, 黑龙江哈尔滨 150001

基金项目:

国家自然科学基金资助项目(G1999065005)。

详细信息

作者简介:
金晓鸥,1962年生,女,教授,主要从事材料可靠性模拟研究。

中图分类号: TG113.25⁺5
计量
- 文章访问数: 6
- HTML全文浏览量: 4
- PDF下载量: 0
- 被引次数: 0
出版历程
- 收稿日期: 2011-03-01
- 网络出版日期: 2024-03-28

Fatigue Behavior of Over-aged State 3J21 Alloy at Room Temperature under Atmospheric Condition

1. School of Architecture and Engineering, Heilongjiang University, Harbin 150080, China;
2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

摘要

摘要: 在MTS万能实验机上对室温大气环境下过时效态3J21合金的疲劳行为进行研究,并采用扫描电镜(SEM)对宏观断口及微观断口进行分析。结果表明,过时效态3J21合金的疲劳裂纹呈穿晶扩展和沿晶扩展,且沿晶扩展的比例较大,疲劳裂纹萌生寿命短,扩展途径相对平直,扩展速率大,裂纹扩展抗力小,疲劳寿命低;过时效态3J21合金疲劳断口由疲劳源、疲劳裂纹扩展区和瞬断区组成。在低速扩展区,过时效态断口呈现冰糖状花样,在中速扩展区未看到长的疲劳条纹,仅发现个别短小的疲劳条纹,瞬断区可观察到二次裂纹、准解理和韧窝。
- 3J21合金 /
- 过时效 /
- 疲劳行为 /
- 裂纹扩展特性
Abstract: In this paper the fatigue behavior of over-aged state 3J21 alloy was studied by using MTS testing machine.The macrographs and micrographs of fatigue fracture were analyzed by scanning electron microscopy(SEM).The results show that the fatigue crack growth for over-aged state alloys is transgranular and the fatigue crack initiation life is short as the proportion of growth along intercrystalline increases.The crack track is straight,the fatigue crack growth rate is fast,the fatigue crack growth resistance is low and the fatigue life is short.The fatigue fracture consists of fatigue source,fatigue crack growth area and instantaneously fractured area of over-aged state 3J21 alloy.In low growth area,the fatigue fracture show sugar candy pattern.In middle growth area,there were not any long fatigue striations inspected,except some small individual fatigue striations.
- 3J21 alloy /
- Over-aged /
- Fatigue behaviors /
- Crack growth characteristic