کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1580588 1514832 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fatigue crack nucleation and growth behaviors of laser melting deposited Ti–6Al–2Zr–Mo–V
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Fatigue crack nucleation and growth behaviors of laser melting deposited Ti–6Al–2Zr–Mo–V
چکیده انگلیسی

The fatigue crack nucleation and growth behaviors of laser melting deposited (LMD) Ti–6Al–2Zr–Mo–V alloy are studied. A fine α/β lamellar microstructure is obtained. High-cycle fatigue test was conducted at room temperature. Fatigue fracture surfaces are examined by SEM. Fatigue crack initiates by cleavage fracture along crystallographic facets in α and propagates by cleavage facets and tearing of α/β lamellar colonies in fatigue crack initiation region. At applied stress less than 750 MPa, fatigue crack nucleation is characterized by the crystallographic cleavage facets of α lamellae and tearing of β lamellae. Striations are observed parallel or perpendicular to the lamellar orientation. Two types of steps are observed in the crack propagation. The mechanisms of fatigue nucleation and growth in laser deposited Ti–6Al–2Zr–Mo–V alloy are related to the slip behaviors and the interactions between crack and colony boundaries.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issues 7–8, 25 March 2010, Pages 1933–1937
نویسندگان
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