کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1583326 | 1514886 | 2007 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of environment on thermomechanical fatigue life
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of environment on thermomechanical fatigue life Effect of environment on thermomechanical fatigue life](/preview/png/1583326.png)
چکیده انگلیسی
Results of studies on the thermomechanical fatigue (TMF) behaviour of metallic engineering materials are presented showing the effect of laboratory air as compared to high vacuum. In order to illustrate the variety of possible effects, three different materials are considered. An austenitic stainless steel is an example for rather small environmental effects on TMF lifetime. At high maximum temperatures applied in the TMF cycle, creep damage prevails. Hence, in-phase (IP) testing is more detrimental than out-of-phase (OP) loading. Vacuum shifts the crack initiation site from the surface to the interior leading to similar lives in IP and OP. The high-temperature titanium alloy IMI 834 suffers from hydrogen embrittlement at moderate temperatures and oxygen uptake at high temperatures. Consequently, the environmental influence on life is pronounced. TiAl-based intermetallic alloys show high environmental susceptibility, which is promoted by the strong ductile-to-brittle transition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 468â470, 15 November 2007, Pages 98-108
Journal: Materials Science and Engineering: A - Volumes 468â470, 15 November 2007, Pages 98-108
نویسندگان
Hans-Jürgen Christ,