Effects of temperature and hold time on creep-fatigue crack-growth behavior of HAYNES® 230® alloy

被引：52

作者：

Lu, Y. L.

Chen, L. J.

Liaw, P. K. ^{[1
]}

Wang, G. Y.

Brooks, C. R.

Thompson, S. A.

Blust, J. W.

Browning, P. F.

Bhattachary, A. K.

Aurrecoechea, J. M.

Klarstrom, D. L.

机构：

[1] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[2] Solar Turbines Inc, San Diego, CA 92186 USA

[3] Haynes Int Inc, Kokomo, IN 46904 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 429卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

fatigue crack-growth; hold time effect; nickel-based superalloys; fractography; oxide removal;

D O I：

10.1016/j.msea.2005.07.039

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The creep-fatigue crack-growth behavior of a HAYNES 230 superalloy was investigated at the temperatures of 649, 816 and 927 degrees C in laboratory air. The crack-growth experiments were conducted under the stress-intensity-factor-range or load-range control. Hold times in the range of 3 s to 5 h were imposed at the maximum load to study the influence of hold time on the crack-growth behavior. The fatigue and creep crack-propagation experiments were also performed as zero and infinite hold-time experiments, respectively. The crack-growth rate increased continuously with increasing the test temperature and/or hold time. The fracture surfaces and cross-sections through the fracture surfaces were examined. As the hold time increased, the fracture appearance changed from the transgranular to intergranular mode. At higher temperatures, this transgranular-intergranular transition occurred at a shorter hold time. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1 / 10

页数：10

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