Enhanced load transfer and ductility in Al-9Ce alloy through heterogeneous lamellar microstructure design by cold rolling and annealing

被引：32

作者：

Zhang, Chi ^{[1
]}

Wang, Yufei ^{[1
]}

Lv, Haiyang ^{[1
]}

Gao, Haiyan ^{[1
]}

Wang, Jun ^{[1
]}

Sun, Baode ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Shanghai Key Lab Adv High Temp Mat & Precis Formi, Sch Mat Sci & Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2021年 / 821卷

基金：

中国国家自然科学基金;

关键词：

Aluminum alloy; Load transfer; Ductility; Lamellar microstructure; Cold rolling; BIMODAL GRAIN-SIZE; MECHANICAL-PROPERTIES; CARBON NANOTUBES; STRENGTHENING MECHANISMS; NANOLAMINATED COMPOSITES; TENSILE PROPERTIES; MATRIX COMPOSITES; PARTICLE-SIZE; FLOW-STRESS; AL-CE;

D O I：

10.1016/j.msea.2021.141591

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Al-Ce alloy has attracted much attention due to its outstanding heat resistance and castability. To further improve the performance of Al-Ce alloy, a two-phase heterogeneous lamellar structure was designed with oriented Al11Ce3 particles, fine grains, and coarse grains in layers in Al-Ce hypoeutectic alloy through cold rolling and annealing. Higher strength and better ductility were obtained compared with the as-cast alloy with the same composition. Mechanism of strengthening and ductility were analyzed by experimental findings and theoretical calculations. The results revealed that fine-grained eutectic aluminum in bimodal structure and the load transfer of oriented Al11Ce3 particles contribute much to the alloy strength. The coarse Al grains in the bimodal structure and the lamellar structure lead to good ductility. The idea of strengthening and toughening Al-Ce alloy is provided, and the process discovered here is amenable to large-scale industrial production at low cost.

引用

页数：9

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