High-speed extrusion of heat-treatable Mg-Al-Ca-Mn dilute alloy

SCRIPTA MATERIALIA

卷:101

Article

Nakata, T.¹  Mezaki, T.¹  Ajima, R.¹  Xu, C.¹  Oh-ishi, K.¹  Shimizu, K.²  Hanaki, S.²  Sasaki, T. T.³  Hono, K.³  Kamado, S.¹ 

[1] Nagaoka Univ Technol, Nagaoka, Niigata 9402188, Japan

[2] Sankyo Tateyama Inc, Sankyo Mat Co, Imizu, Toyama 9348515, Japan

[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

关键词: High-speed extrusion;    Mg-Al-Ca-Mn alloy;    Age hardening;    Tensile properties;   

DOI  :  10.1016/j.scriptamat.2015.01.010

来源: Elsevier

【 摘 要 】

A newly developed dilute magnesium alloy, Mg-0.27Al-0.13Ca-0.21Mn (at.%), shows extraordinary high-speed extrudability of a die-exit speed of 60 m/min. Subsequent artificial aging at 200 degrees C (T5) enhanced the proof stress from 170 MPa to 207 MPa due to the precipitation of Guinier Preston (G.P.) zones and weakened basal texture while keeping good ductility of 12.5%. High-speed extrusion reduces the processing cost, so the dilute Mg-Al-Ca-Mn alloy could be an industrially viable low-cost medium strength structural material. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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