کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7973558 | 1514628 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure evolution and tensile properties of conventional cast TiAl-based alloy with trace Ni addition
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Microstructure evolution and tensile properties of conventional cast TiAl-based alloy with trace Ni addition Microstructure evolution and tensile properties of conventional cast TiAl-based alloy with trace Ni addition](/preview/png/7973558.png)
چکیده انگلیسی
The microstructure evolution and tensile properties of Ti-48Al-2Cr-2Nb-0.25Ni alloy fabricated by the induction skull melting (ISM) process were investigated. Results showed that the influence of trace Ni addition on the cast microstructure was slight, while the γ phase fraction increased relatively. After tensile tests at elevated temperature, nanoscale Ï3 particles precipitated within the lamellar colony in the gauge area. The Ï3 phase exhibited the specific orientation relationship with the α2 and γ phases: (224Ì
2)Ï3//(404Ì
1)α2//(113)γ and [11Ì
00]Ï3//[112Ì
0]α2//[1Ì
10]γ. At elevated temperature, the UTS and εf were enhanced evidently by Ni addition than that of Ti-48Al-2Cr-2Nb alloy. Dislocations were pinned by the nanoscale Ï3 precipitates during tensile deformation at elevated temperature. The nanoscale Ï3 precipitates and increased γ phase fraction induced by Ni alloying could account for the notable tensile properties in the present work. The precipitation behavior and the main strengthening mechanism were analyzed and discussed in detail.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 715, 7 February 2018, Pages 41-48
Journal: Materials Science and Engineering: A - Volume 715, 7 February 2018, Pages 41-48
نویسندگان
Jianchao Han, Jing Dong, Shuzhi Zhang, Changjiang Zhang, Shulong Xiao, Yuyong Chen,