کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7991245 | 1516138 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The microstructure and martensitic transformation behaviors in Ti-Ni-Hf -X (Ag, Sn) high temperature shape memory alloys
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The microstructures and martensitic transformation behaviors of the quaternary Ti-Ni-Hf-X (Ag, Sn) high temperature shape memory alloys were investigated systematically. The results showed that Ag and Sn were soluble in Ti-Ni-Hf matrices with a limited solubility of 0.28â¯at.% and 1.78â¯at.%, respectively. In addition to the martensite and (Ti,Hf)2Ni phase, the pure elemental Ag particle was also observed in the Ti-Ni-Hf-Ag alloys. However, the excessive Sn addition resulted in the formation of the intermetallics such as Ti3Sn type and TiNi2Sn type phase in the Ti-Ni-Hf-Sn alloys. Moreover, with the increasing of Sn content, the amounts of (Ti,Hf)2Ni phases decreased owing to the dissipation reaction of 12(Ti,Hf)2Ni +8Sn â 6TiNiHf + 5(Ti,Hf)3Sn + 3(Ti,Hf)Ni2Sn. Single martensitic transformation corresponding to B2âB19â² was observed in Ti-Ni-Hf-Ag alloys. While the Ti-Ni-Hf-Sn alloys with the higher Sn content (â¥2â¯at.%) were characterized by two-steps martensitic transformation during the heating process. Both Sn and Ag addition reduced the martensitic transformation temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 756, 5 August 2018, Pages 19-25
Journal: Journal of Alloys and Compounds - Volume 756, 5 August 2018, Pages 19-25
نویسندگان
Xiaoyang Yi, Guobo Pang, Bin Sun, Xianglong Meng, Wei Cai,