|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Ultrafine-grained Materials X
||Grain Refinement of Mg Alloys Utilizing Rapidly Solidified Flaky Powder Metallurgy
||Taekyung Lee, Michiaki Yamasaki, Yoshihito Kawamura, Yasuo Marumo
|On-Site Speaker (Planned)
Rapidly solidified powder metallurgy (RS P/M) significantly refined grains of Mg-Zn-Y alloy to a size of 100-200 nm. Recently, RS P/M has been improved further to avoid a high risk of explosion, leading to the rapidly solidified ‘flaky’ powder metallurgy (RS FP/M). This successfully enabled safer and more cost-effective manufacturing conditions. Since many related studies about this technique have been performed with Mg-Zn-Y alloys and their variations thus far, this study verifies the capability of RS FP/M technique for conventional Mg alloys to expand its applications. The fabricated Mg alloys (e.g., AZ91) exhibited a strong grain refinement and resultant improvement in mechanical properties. We investigated the role of continuous dynamic recrystallization in the formation of bimodal-grained structure containing a high portion of ultrafine-grained area. Room- and high-temperature tensile properties of this alloy was also interpreted on the basis of microstructural characteristics.
||Planned: Supplemental Proceedings volume