Microstructure and Properties of T6 Heat Treatment Al-Mg-Si-Zr-xEr Alloy Sheets

Zhao Qian; Yuan Xiaoguang; Huang Hongjun; Zhao Peng

doi:10.15980/j.tzzz.2015.11.027

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Microstructure and Properties of T6 Heat Treatment Al-Mg-Si-Zr-xEr Alloy Sheets
Vol. 35, Issue 11, Pages: 1217-1220(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.11.027

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[1]赵倩,袁晓光,黄宏军,赵鹏.T6处理Al-Mg-Si-Zr-xEr合金板材的组织和性能[J].特种铸造及有色合金,2015,35(11):1217-1220.

Zhao Qian, Yuan Xiaoguang, Huang Hongjun, et al. Microstructure and Properties of T6 Heat Treatment Al-Mg-Si-Zr-xEr Alloy Sheets. [J]. Special Casting & Nonferrous Alloys 35(11):1217-1220(2015)
[1]赵倩,袁晓光,黄宏军,赵鹏.T6处理Al-Mg-Si-Zr-xEr合金板材的组织和性能[J].特种铸造及有色合金,2015,35(11):1217-1220. DOI： 10.15980/j.tzzz.2015.11.027.

Zhao Qian, Yuan Xiaoguang, Huang Hongjun, et al. Microstructure and Properties of T6 Heat Treatment Al-Mg-Si-Zr-xEr Alloy Sheets. [J]. Special Casting & Nonferrous Alloys 35(11):1217-1220(2015) DOI： 10.15980/j.tzzz.2015.11.027.

摘要

借助于X射线衍射分析、光学显微镜、透射电镜、扫描电镜和能谱仪等

研究了Al-Mg-Si-Zr-xEr合金板材经T6热处理后的组织性能

并探讨了Er对合金组织与性能的影响。结果表明

随着Er含量的提高

合金晶粒逐渐细化

合金强度、硬度提高;Al-Mg-Si-Zr-Er合金颗粒状和近颗粒状第二相主要为Mg2Si、Q-Al1.9CuMg4.1Si3.3、CuAl2、Al4Mn3Si2、Al3Er、Al3Zr、Al3（Er

Zr）;Er添加促进了β"相的析出

在540℃×1h固溶+180℃×5h时效后

Al-Mg-Si-Zr-0.3Er合金中的β"相细小均匀地弥散析出。

Abstract

Microstructure and properties of T6 treated Al-Mg-Si-Zr-xEr alloy sheets were investigated by tensile testing

transmission electron microscope（TEM）

X-ray diffraction（XRD）

scanning electron microscope（SEM）

energy dispersive spectrum（EDS）and optical microscope（OM）.Effects of Er element on microstructure and properties of alloy sheets were analyzed.The results show that with the Er content increases

the grain size is refined gradually

and the solute atom is precipitated more fully

so the tensile strength and hardness are improved.The granular and near-granular second phases mainly existing in Al-Mg-Si-Zr-xEr alloy sheets are composed of Mg2 Si

Q-Al1.9CuMg4.1Si3.3

CuAl2

Al4Mn3Si2

Al3 Er

Al3Zr

Al3（Er

Zr）.The addition of element Er can promote the precipitation ofβ″phase.The fine and uniformβ″phase in the Al-Mg-Si-Zr-0.3Er alloy is precipitate dispersively after the solution treatment at 540 ℃for 1hand aging at 180 ℃for 5h.