Evolution of Elevated-Temperature Strength and Creep Resistance during Multi-Step Heat Treatments in Al-Mn-Mg Alloy

被引：9

作者：

Wang, G. S. ^{[1
,2
]}

Liu, K. ^{[3
]}

Wang, S. L. ^{[1
,2
]}

机构：

[1] Northeastern Univ, Minist Educ, Key Lab Electromagnet Proc Mat, Shenyang 110819, Liaoning, Peoples R China

[2] Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China

[3] Univ Quebec Chicoutimi, Dept Appl Sci, Saguenay, PQ G7H 2B1, Canada

来源：

MATERIALS | 2018年 / 11卷 / 07期

关键词：

Al-Mn-Mg alloy; dispersoids; heat treatment; elevated temperature; strength; creep resistance; CAST AA3003 ALLOY; THRESHOLD STRESS; ALUMINUM-ALLOY; HOMOGENIZATION TREATMENT; INTERMETALLIC PARTICLES; MECHANICAL-PROPERTIES; MO ADDITION; PRECIPITATION; DISPERSOIDS; MICROSTRUCTURE;

D O I：

10.3390/ma11071158

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The present work has systematically investigated the evolution of dispersoids and elevated-temperature properties including strength and creep resistance during various multi-step heat treatments in Al-Mn-Mg 3004 alloys. Results show that only the alpha-Al(MnFe)Si dispersoid is observed in the studied temperature range (up to 625 degrees C), and that it coarsens with increasing temperature to 500 degrees C, but dissolves at 625 degrees C. The evolution of elevated-temperature strength and creep resistance is greatly related to the temperature of each step during the multi-step heat treatments. Generally, lower temperature at the first-step heat treatment leads to higher properties, while the properties decrease with increasing temperature of last-step heat treatment. Suitable models have been introduced to explain the evolution of strength and the creep threshold stress at elevated-temperatures during the various heat treatments.

引用

页数：14

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