کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1575955 1514761 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The microstructure evolution in the isothermal compression of Ti-17 alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
The microstructure evolution in the isothermal compression of Ti-17 alloy
چکیده انگلیسی

The effects of processing parameters on flow curves and microstructure evolution in the isothermal compression of Ti-17 alloy are investigated. The experiments are conducted in a deformation temperature range of 800–920 °C, strain rate range of 0.01–10.0 s−1 and height reduction range of 30–70%. The flow stress increases with a decrease in deformation temperature or an increase in strain rate. Based on the optical microstructure observations, both of deformation temperature and strain rate have a great effect on the volume fraction of α grains. The effect of strain rate on primary α grains morphology and softening mechanism is of first-order importance compared with the effects of deformation temperature and strain. Transmission electron microscope (TEM) analysis is carried out at a deformation temperature of 840 °C, strain rate of 0.1 s−1 and 10.0 s−1 to reveal the two mechanisms for the morphology evolution of primary α grains. When the strain rate is relatively low, the primary α grains are globularized after the penetration of β phase along α/α subboundaries. While the strain rate is relatively high, the primary α grains are elongated, and the dislocation density in grain interior is relatively high.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 582, 10 October 2013, Pages 108–116
نویسندگان
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