Improving Elevated-Temperature Strength of an Al–Mn–Si Alloy by Strain-Induced Precipitation
Yangyang Zhang,
Wei Jin,
Xuanzhang Hao,
Feng Qiu,
Qinglong Zhao
Affiliations
Yangyang Zhang
Key Laboratory of Automobile Materials, Ministry of Education, and School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130025, China
Wei Jin
Key Laboratory of Automobile Materials, Ministry of Education, and School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130025, China
Xuanzhang Hao
Key Laboratory of Automobile Materials, Ministry of Education, and School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130025, China
Feng Qiu
Key Laboratory of Automobile Materials, Ministry of Education, and School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130025, China
Qinglong Zhao
Key Laboratory of Automobile Materials, Ministry of Education, and School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun 130025, China
The coupled effect of strain-induced precipitation and stabilized substructure on the elevated-temperature strength of an Al–Mn–Si alloy and its thermal stability have been investigated. Prestrain significantly promotes the nucleation of nano-sized dispersoids, and strain-induced precipitation suppresses recrystallization, stabilizing substructure at elevated temperatures. Compared with the dispersoids formed during the heat treatment of as-cast alloy, substructure does not increase the coarsening rate of strain-induced precipitates. The strain-induced precipitation and stabilized substructure profoundly strengthen the aluminum alloy at the elevated temperature (300 °C).
