کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1573126 1514670 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Beta heat treatment of laser melting deposited high strength near β titanium alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Beta heat treatment of laser melting deposited high strength near β titanium alloy
چکیده انگلیسی
To improve the mechanical properties of laser melting deposited Ti-5Al-5Mo-5V-1Cr-1Fe high strength near β titanium alloy, the traditional heat treatment and new designed beta heat treatment are applied in this study. The corresponding microstructures and tensile properties are investigated. It is found that the traditional heat treated samples consist of continuous linear grain boundary α (αLGB). Its formation is found to be associated with the layer by layer thermal cycling treatment in laser melting deposition process. The cracks preferentially initiate and propagate along αLGB, leading to intercrystalline fracture and low ductility. In contrast, beta heat treatment leads to the formation of herringbone Widmanstätten grain boundary α (αWGB). The αWGB effectively inhibits the crack propagation along grain boundary, resulting in the predominantly transcrystalline fracture and improved ductility.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 673, 15 September 2016, Pages 185-192
نویسندگان
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