Tensile Properties of a Friction Stir Processed Al-Cu 2218 Alloy at Elevated Temperatures and Related Microstructural Characteristics

被引：0

作者：

Chen, Ssu-Ta ^{[1
]}

Lui, Truan-Sheng ^{[1
]}

Chen, Li-Hui ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 70101, Taiwan

来源：

TMS 2010 139TH ANNUAL MEETING & EXHIBITION - SUPPLEMENTAL PROCEEDINGS, VOL 1: MATERIALS PROCESSING AND PROPERTIES | 2010年

关键词：

friction stir process; tensile elongation; grain boundary sliding; GRAIN-SIZE; SUPERPLASTICITY; ALUMINUM; PRECIPITATION; FORMABILITY; STABILITY; WELDS;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tensile tests of as extruded (F) and as friction stir processed (FFSP) Al-Cu 2218 alloy are conducted at elevated temperatures from room temperature to 450 degrees C, respectively. From room temperature to 300 degrees C, F samples perform a higher tensile flow stress than FFSP samples, and this is resulted from an effect of natural aging. On the other hand, the stable FFSP microstructures promote grain boundary sliding to occur and corresponds to higher strain hardening exponents. The remarkable increasing in tensile elongation of AF at 450 degrees C is ascribed mainly to the occurrence of grain boundary sliding.

引用

页码：129 / 138

页数：10

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