کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11001639 | 1001561 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of Al-Sr master alloy on the formation of long period stacking ordered phase and mechanical properties of Mg-Gd-Zn alloy
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The rapid formation of profuse fine Long Period Stacking Ordered Structure (LPSO) lamellae is especially desired for Mg-Gd-Zn alloys as type II wherein LPSO phases are difficult to form in as-cast state and prolonged heat treatments are necessary. The aim of this work is to investigate the effect of various Al-10â¯Sr master alloy additions (0, 0.6, 1.8, in wt. %) on LPSO formation in as-cast Mg-14.02Gd-2.33Zn alloy and the microstructural evolution during subsequent heat treatment and ECAP processing as well as their mechanical behavior variations. Minor addition of 0.6 wt. % Al-Sr master alloy introduces abundant 18R and 14H-LPSO phases in as-cast Mg-Gd-Zn alloy, and accelerates the microstructural evolution into high density of well-aligned long fiber-like 14H nanolamellae only through short-time solid solution and 1-pass ECAP processing as well as low-temperature aging. While a higher level of 1.8 wt. % (Al-Sr) addition produces short rod-like 14H particulates and considerable hard Al2Gd, network (Mg, Al)3Gd intermetallic compounds deteriorating the mechanical property. Consequently, processed Mg-Gd-Zn-0.6(Al-Sr) alloy exhibits a superior mechanical property due to synergistic effects of long fiber-like LPSO phase strengthening and grain refinement strengthening and so on. This paper provides an effective and economical method to fabricate high-performance Mg-Gd-Zn alloys reinforced with LPSO phases.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 738, 19 December 2018, Pages 125-134
Journal: Materials Science and Engineering: A - Volume 738, 19 December 2018, Pages 125-134
نویسندگان
Liping Bian, Yuanliang Zhao, Yichen Zhou, Tao Wang, Lipeng Wang, Wei Liang,