Imparting high-temperature grain stability to an Al-Mg alloy

SCRIPTA MATERIALIA

卷:190

Article

Pariyar, Abhishek^1,2  Toth, Laszlo S.^2,3  Kailas, Satish, V¹  Peltier, Laurent³ 

[1] Indian Inst Sci, Dept Mech Engn, Bangalore 560012, Karnataka, India

[2] Univ Lorraine, Lab Excellence Design Alloy Met Low Mass Struct L, F-57070 Metz, France

[3] Univ Lorraine, LEM3 Lab, CNRS, Arts & Metiers ParisTech, F-57000 Metz, France

关键词: Grain stability;    Zener pinning;    Aluminum alloy;    Hardness;    Equiaxed microstructure;   

DOI  :  10.1016/j.scriptamat.2020.08.035

来源: Elsevier

【 摘 要 】

Al alloys, despite their excellent strength-to-weight ratio, cannot be used at elevated temperatures because of microstructural instability owing to grain growth and precipitate coarsening, thus, leading to a drastic loss in their strength. In this work, we have attempted to address the issue of grain growth by introducing in-situ formed polymer derived ceramics in an Al-Mg alloy. A stable grain structure with minimal loss in hardness when exposed to 450 degrees C and 550 degrees C for 1 hour was obtained due to the particle pinning of the grain boundaries by the Zener mechanism. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free