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1. (WO2017154969) MAGNESIUM-BASED ALLOY EXTENDED MATERIAL AND METHOD FOR MANUFACTURING SAME

Pub. No.:    WO/2017/154969    International Application No.:    PCT/JP2017/009198
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Thu Mar 09 00:59:59 CET 2017
IPC: C22C 23/00
C22F 1/06
C22F 1/00
Applicants: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
国立研究開発法人物質・材料研究機構
Inventors: SOMEKAWA Hidetoshi
染川 英俊
SHINGH Alok
シン アロック
INOUE Tadanobu
井上 忠信
Title: MAGNESIUM-BASED ALLOY EXTENDED MATERIAL AND METHOD FOR MANUFACTURING SAME
Abstract:
Rare-earth elements are commonly added or crystal grain size is commonly reduced in order to enhance ductility or forming properties in a magnesium alloy. However, conventionally added elements inhibit grain boundary sliding activity for complementing plastic deformation. There is therefore a need to find an added element which has the effect of promoting grain boundary sliding not only at the conventional deformation speed but also in a higher speed region while maintaining a microstructure for activating non-basal-plane dislocation movement. The present invention provides an Mg-based alloy extended material including 0.25 mass% to 9 mass% Bi, the remainder comprising Mg and unavoidable components, the Mg-based alloy extended material having excellent room-temperature ductility and being characterized in that the average crystal grain size of the Mg parent phase thereof after solutionizing treatment and hot plastic working after casting is 20 µm or less.