کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1585561 1514916 2006 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Creep behavior of Ti–6Al–4V and a comparison with titanium matrix composites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Creep behavior of Ti–6Al–4V and a comparison with titanium matrix composites
چکیده انگلیسی

Creep behavior of the conventional Ti–6Al–4V alloy with a Widmanstätten microstructure has been investigated in air under constant load tensile tests. The stress exponent values of 11.3 and 5.2 were obtained at 500 and 600 °C, respectively. By incorporating the threshold stress into analysis, the creep data can be rationalized to stress exponents of 4.4 at 500 °C and 4.1 at 600 °C, which are consistent with the lattice diffusion controlled dislocation climb process in α-Ti. In the preliminary study, creep properties of α-Ti, TiBw/Ti and TiCp/Ti–6Al–4V have been collected from literature and compared with those of Ti–6Al–4V obtained in this work in the applied stress range of 97–472 MPa. Creep strain rates of the conventional Ti–6Al–4V alloy are lower than those of the α-Ti and composites. Apparently, the higher creep resistance of Ti–6Al–4V can be attributed to α/β interfaces acting as obstacles to dislocation motion and to the average grain size of 395 μm, which reduces the grain boundary sliding, dislocations sources and the rate of oxygen diffusion along grain boundaries.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 428, Issues 1–2, 25 July 2006, Pages 319–326
نویسندگان
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