کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1580339 | 1001241 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A study of phase transformation in a TiAlNb alloy and the effect of Cr addition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The phase transformation paths, transformation temperatures and phase equilibria of Ti-45Al-27Nb and Ti-45Al-22Nb-5Cr (at%) alloys were evaluated over a temperature range from 865 °C to 1600 °C. Both alloys solidified as single β-phase and transformed to γ +Â Ï phases upon slow cooling. The addition of Cr did not affect the β â γ transformation temperature upon slow cooling. In contrast, the temperature, at which the Ï-phase formed, was reduced noticeably. Upon heating, the temperature at which the β-phase evolves from the γ +Â Ï microstructure was found to decrease significantly with the addition of Cr. In the ternary alloy the formation of the γ-phase could not be retarded on quenching, however, the substitution of Nb with Cr allowed for the retainment of the β-phase to room temperature. These results are explained by the partitioning of Cr into the β-phase, which in addition to thermodynamic stability reduces the kinetics of transformations at lower temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issue 12, 15 May 2010, Pages 2857-2863
Journal: Materials Science and Engineering: A - Volume 527, Issue 12, 15 May 2010, Pages 2857-2863
نویسندگان
Michael S. Kesler, Sonalika Goyel, Orlando Rios, Damian M. Cupid, Hans J. Seifert, Fereshteh Ebrahimi,