真空环境下过时效态2A12合金的疲劳行为

材料科学与工艺, 2006, 14(2): 134-140. doi: 10.3969/j.issn.1005-0299.2006.02.007

真空环境下过时效态2A12合金的疲劳行为

金晓鸥 ^1, , 窦弢 ^2, , 赵慧杰 ^3, , 何世禹 ^4, , 胡焜 ^5,

1.黑龙江大学,建筑工程学院,黑龙江,哈尔滨,1500086

2.哈尔滨市第703研究所,黑龙江,哈尔滨,150036

3.哈尔滨工业大学,材料科学与工程学院,黑龙江,哈尔滨,150001

4.哈尔滨工业大学,材料科学与工程学院,黑龙江,哈尔滨,150001

5.黑龙江大学,建筑工程学院,黑龙江,哈尔滨,1500086

基金项目: 科技部科研项目(G1999065005)

关键词： 2A12合金 , 过时效态 , 疲劳 , 室温大气 , 真空

Fatigue behavior of over-aged 2A12 alloys in a vacuum environment

在真空拉-压疲劳试验机上对过时效态2A12合金的疲劳行为进行了研究,并利用扫描电镜分析了真空对疲劳断口形貌的影响.结果表明:真空环境中疲劳寿命明显提高;在低循环应力下,真空环境中的疲劳断裂循环次数比室温大气环境中高近3倍;室温大气和真空环境下的疲劳断口均为穿晶断口,断口中均出现疲劳条纹、台阶和韧窝,且在低循环应力下,疲劳条纹出现的区域较多,但真空环境下疲劳断口中的台阶高度较低,疲劳条纹与韧窝较细小.

参考文献

[1]	SLIVIK D C;BLANKENSHIP C P;STARKE JR E A et al.Intrinsic fatigue crack growth rates for Al-Li-Cu -Mg alloys in vacuum[J].Metallurgical and Materials Transactions,1993,22(03):1807-1817.
[2]	ENDO Kichiro;KOMAI Kenjiro .Fatigue crack propagalion in an aluminum alloy in ultra-high vacuum[J].Journal of the Society of Materials Science Japan,1977,26:143-148.
[3]	KHIREDDINE D;KHIREDDINE M H .Low cycle fatigue behavior of an aluminium alloy with small shearable precipitates[J].Effect of Surface Coating,2000,22:585-591.
[4]	VERKIN B I;GRINBERG N M .The effect of vacuum on the fatigue behavior of metals and alloys[J].Materials Science and Engineering,1979,41:149-181.
[5]	WANG R;MUGHRABI H .Fatigue of copper single crystals in vacuum and in air[J].Materials Science and Engineering,1984,65:219-243.
[6]	GRINGERG N M.The effect of vacuum on fatigue crack growth[J].International Journal of Fatigue,1982(04):83-95.
[7]	A. Vinogradov;S. Hashimoto;S. Miura .Fatigue crack initiation and propagation in [210] oriented copper single crystals in vacuum and in air[J].Scripta materialia,1996(5):775-779.

上一张下一张

计量

下载量()
访问量()

作者相关

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网

真空环境下过时效态2A12合金的疲劳行为

Fatigue behavior of over-aged 2A12 alloys in a vacuum environment

参考文献