DWELL-SENSITIVE FATIGUE IN A NEAR ALPHA-TITANIUM ALLOY

被引：25
|
作者：
EVANS, WJ
机构：
[1] Univ Coll of Swansea, Swansea, Wales, Univ Coll of Swansea, Swansea, Wales
来源：
JOURNAL OF MATERIALS SCIENCE LETTERS | 1987年 / 6卷 / 05期
关键词：
AIRCRAFT ENGINES; JET AND TURBINE - Materials - AIRCRAFT MATERIALS - Light Metals - HYDROGEN;
D O I：
10.1007/BF01739287
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The author has made a preliminary study of the effect of hydrogen concentration in the range 10 to 50 ppm. The failure data obtained do not appear to support the deductions of the shear band model. In contrast, they suggest that there is an increase in life with increasing hydrogen concentration. For service applications, the alloy IMI685 (Ti-6Al-5Zr-0. 5Mo-0. 25Si) normally has a fine acicular or basketweave microstructure produced by air cooling or oil quenching from above the beta transus before final heat treatment at 850 K. In the present investigation, a coarse aligned structure was deliberately introduced by furnace cooling through the beta transus. Previous work has shown this microstructure to be particularly sensitive to dwell fatigue conditions.
引用
收藏
页码：571 / 574
页数：4
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