Effects of pre-deformation on microstructure and tensile properties of Al-Zn-Mg-Cu alloy produced by modified strain induced melt activation

被引：20

作者：

Afshari, Behzad Mohasel ^{[1
]}

Mirjavadi, Seyed Sajad ^{[1
]}

Dolatabad, Yousef Askari ^{[2
]}

Aghajani, Mojtaba ^{[3
]}

Givi, Mohammad Kazem Besharati ^{[1
]}

Alipour, Mohammad ^{[4
,5
,6
]}

Emamy, M. ^{[4
]}

机构：

[1] Univ Tehran, Coll Engn, Sch Mech Engn, Tehran, Iran

[2] Sirjan Univ Technol, Dept Civil Engn, Kerman, Iran

[3] Univ Tehran, Fac Engn, Dept Ind Engn, Tehran, Iran

[4] Univ Tehran, Sch Met & Mat Engn, Tehran, Iran

[5] KN Toosi Univ Technol, Fac Mat Sci & Engn, Tehran, Iran

[6] Univ Tabriz, Dept Mat Engn, Fac Mech Engn, Tabriz, Iran

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2016年 / 26卷 / 09期

关键词：

aluminium alloy; casting; grain refinement; strain induced melt activation; semisolid processing; tensile properties; MECHANICAL-PROPERTIES; ALUMINUM-ALLOYS; AS-CAST; 7055-ALUMINUM-ALLOY; EXTRUSION;

D O I：

10.1016/S1003-6326(16)64349-2

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effects of Al-8B grain refiner on microstructure and tensile properties of an Al-12Zn-3Mg-2.5Cu alloy produced by modified strain induced melt activation process were investigated. Pre-deformation of 60% was used by hot working at 300 degrees C. After pre-deformation, the samples were heated to a temperature above the solidus and below the liquidus point and maintained in the isothermal conditions at three different temperatures (500, 550 and 590 degrees C) for varying time (10, 20 and 40 min). It was observed that strain induced melt activation has caused the globular morphology of alpha(Al) grains. Microstructural study was carried out on the alloy by using optical microscope and scanning electron microscope in both unrefined and B-refined conditions. The results showed that for the desired microstructures of the alloy during SIMA process, the optimum temperature and time are 550 degrees C and 10 min, respectively. After the T6 heat treatment, the average tensile strengths increased from 278 to 585 MPa and 252 to 560 MPa for samples refined with 3.75% Al-8B before and after SIMA process, respectively. The ultimate strength of SIMA specimens is lower than that of B-refined specimens.

引用

页码：2283 / 2295

页数：13

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