کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7973211 | 1514625 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Factors influencing superplasticity in the Ti-6Al-4V alloy processed by high-pressure torsion
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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: Factors influencing superplasticity in the Ti-6Al-4V alloy processed by high-pressure torsion Factors influencing superplasticity in the Ti-6Al-4V alloy processed by high-pressure torsion](/preview/png/7973211.png)
چکیده انگلیسی
Two different initial microstructures, martensitic and lamellar, were developed in a Ti-6Al-4V alloy to examine their effect on the high temperature mechanical properties and superplasticity after high-pressure torsion (HPT). Significant grain refinement was achieved in both conditions with grain sizes after HPT processing of ~30 and ~40â¯nm, respectively. The nanocrystalline alloy in both conditions was subjected to mechanical testing at 923-1073â¯K using strain rates in the range from 10â3 to 10â1 sâ1. The martensitic and lamellar alloys exhibited excellent ductility at these high temperatures including superplastic elongations at 973â¯K with maximum elongations of 815% and 690%, respectively. The fcc phase was stable at elevated temperatures in the martensitic alloy and the results suggests the fcc phase may contribute to the superior superplastic properties of the martensitic alloy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 718, 7 March 2018, Pages 198-206
Journal: Materials Science and Engineering: A - Volume 718, 7 March 2018, Pages 198-206
نویسندگان
Hamed Shahmir, Fariba Naghdi, Pedro Henrique R. Pereira, Yi Huang, Terence G. Langdon,