Effect of Deep Cryogenic Treatment on Aging Processes of Al–Mg–Si Alloy

被引：0
|
作者：
Ying Yuanchun Huang
Xianwei Li
Zhengbing Ren
机构：
[1] Research Institute of Light Alloy,
[2] Central South University,undefined
[3] School of Materials Science and Engineering,undefined
[4] Central South University,undefined
[5] State Key Laboratory of High Performance Complex Manufacturing,undefined
[6] Central South University,undefined
来源：
Physics of Metals and Metallography | 2019年 / 120卷
关键词：
Al–Mg–Si alloy; deep cryogenic treatment; mechanical properties; precipitation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Abstract—This study investigated the effect of deep cryogenic treatment (DCT) on the aging processes of Al–0.43Mg–1.27Si alloy. Differences in the mechanical properties and precipitation behavior between conventional treatment and DCT were analyzed by means of hardness test, tensile test, optical microscopy (OM), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). DCT promoted the precipitation of Si phases, which is accompanied by an increase in hardness. The content of Si was improved from 0.84 to 1.08% and the hardness was increased from 46.11 to 48.89 HV. The temperature of precipitation of GP zones and β'' phase was lower, which accelerated precipitation of the β'' phase and then improved the aging hardening response of the alloy.
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页码：914 / 918
页数：4
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