کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1581913 | 1514865 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Factors influencing the equal-channel angular pressing of Ti-6Al-4V alloy having lamellar microstructure
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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 the equal-channel angular pressing of Ti-6Al-4V alloy having lamellar microstructure Factors influencing the equal-channel angular pressing of Ti-6Al-4V alloy having lamellar microstructure](/preview/png/1581913.png)
چکیده انگلیسی
A study was made to investigate the factors influencing the formability on equal-channel angular (ECA) pressing of Ti-6Al-4V alloy, as a typical hard-to-work material, with a variation of ram speed. ECA pressings of Ti-6Al-4V alloy with initial lamellar microstructure were carried out by utilizing a set of die for isothermal condition. In this study, the equation for the effective strain rate during ECA pressing was evaluated by considering the geometry of both die and sample. Quantitative measurement showed that strain rate less than 0.27Â sâ1 was found to be the optimum condition for sound deformation while specimens showed the noticeable shear cracking with stain rate above 0.67Â sâ1. In spite of optimum condition determined here, however, shallow shear segments were still found in a specimen. This was mainly attributed to the flow localization associated with the flow softening behavior of lamellar microstructure. Such behavior was dependent on the lamellar structure per se, which was in discussion on the relation and the ability to transmit slip across either colony boundaries or alpha/beta lamellae interfaces as a slip filter.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 493, Issues 1â2, 15 October 2008, Pages 164-169
Journal: Materials Science and Engineering: A - Volume 493, Issues 1â2, 15 October 2008, Pages 164-169
نویسندگان
Young Gun Ko, Duck Young Hwang, Dong Hyuk Shin, Sunghak Lee, Chong Soo Lee,