Investigation into quasi-static and dynamic tensile mechanical properties of aluminium–scandium alloy. Issue 17 (21st November 2020)

• Record Type: Journal Article
• Authors: Lin, Chi-Feng; Chen, Tao-Hsing; Tsai, Liren; Hsieh, Tsung-Han; Su, Wei-Chih; Wang, I.-Hsin
• Is Part Of: Materials science and technology. Volume 36:Issue 17(2020)
• Page Start: 1820
• Page End: 1828
• Publication Date: 2020-11-21
• Subjects: Aluminium–scandium alloy -- dynamic behaviour -- constitutive model -- finite element simulation; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2020.1838709
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : The mechanical properties of aluminium–scandium alloy are investigated at strain rates ranging from 0.0005 to 2600 s −1 and a temperature of 25°C using a material testing system and split-Hopkinson tensile bar. The temperature dependence of the material response is investigated at elevated temperatures of 100 to 300°C under a strain rate of 0.0005 s −1 . The flow stress increases with increasing strain rate but decreases with increasing temperature. The scanning electron microscope observations reveal that the fracture surface contains a large number of dimpled structures with intermetallic precipitates, which suggests a ductile failure mode. Material constants for a combined Johnson-Cook/Cowper-Symonds constitutive model are determined to describe the dynamic behaviours of aluminium–scandium alloys.