کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5455193 1514637 2017 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Internal crack initiation characteristics and early growth behaviors for very-high-cycle fatigue of a titanium alloy electron beam welded joints
ترجمه فارسی عنوان
خصوصیات شروع بازسازی داخلی و رفتارهای زودرس رشد برای خستگی بسیار چرخه جوشکاری الکترونی آلیاژ تیتانیوم
کلمات کلیدی
خستگی بسیار کم چرخه، آغاز قاچاق انتشار اولیه، علائم ساحل،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
The very-high-cycle fatigue has become an important issue in recent years. The crack initiation mechanism and early crack growth behaviors of electron beam welded joints of TC21 titanium alloy were discussed. In order for the subsurface crack growth to be observed, a repeated two-step fatigue test was performed for the beach mark formation. Two kinds of initiation modes of microcracks could exist. One is the initiation from microvoids and the other results from the dislocation accumulation. During early growth, the microcrack path could deflect when it passed through the boundaries, leading to the FGA region formation. The crack closure could also occur during growth. By the Paris' law integration, the crack propagation life was discovered to occupy only a small number of the fatigue life.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 706, 26 October 2017, Pages 311-318
نویسندگان
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