کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1574357 | 1514711 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ambient-temperature high damping capacity in TiPd-based martensitic alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Shape memory alloys (SMAs) have attracted considerable attention for their high damping capacities. Here we investigate the damping behavior of Ti50(Pd50âxDx) SMAs (D=Fe, Co, Mn, V) by dynamic mechanical analysis. We find that these alloys show remarkably similar damping behavior. There exists a sharp damping peak associated with the B2-B19 martensitic transformation and a high damping plateau (Qâ1~0.02-0.05) over a wide ambient-temperature range (220-420Â K) due to the hysteretic twin boundary motion. After doping hydrogen into the above alloys, a new relaxation-type damping peak appears in the martensite phase over 270-360Â K. Such a peak is considered to originate from the interaction of hydrogen atoms with twin boundaries and the corresponding damping capacity (Qâ1~0.05-0.09) is enhanced by roughly twice that of the damping plateau for each alloy. Moreover, the relaxation peaks are at higher temperatures for the TiPd-based alloys (270-370Â K) than for the TiNi-based alloys (190-260Â K). We discuss the influence of hydrogen diffusion, mobility of twin boundaries and hydrogen-twin boundary interaction on the temperature range of the relaxation peak. Our results suggest that a martensite, with appropriate values for twinning shear and hydrogen doping level, provides a route towards developing high damping SMAs for applications in desired temperature ranges.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 632, 24 April 2015, Pages 110-119
Journal: Materials Science and Engineering: A - Volume 632, 24 April 2015, Pages 110-119
نویسندگان
Dezhen Xue, Yumei Zhou, Xiangdong Ding, Kazuhiro Otsuka, Turab Lookman, Jun Sun, Xiaobing Ren,