Competitive relationship between thermal effect and grain boundary precipitates on the ductility of an as-quenched Al-Cu-Mn alloy

Wang, Wenguang1,2,3; Wang, Gang1,2,3; Guo, Guannan4; Rong, Yiming5

2018-05

10.1177/1056789516683540

INTERNATIONAL JOURNAL OF DAMAGE MECHANICS   影响因子和分区

1056-7895

1530-7921

The ductility of an Al-Cu-Mn alloy is typically characterized by fracture strain and is influenced by experimental temperature and its microstructure. Previous researches show that the ductility increases with the temperature and decreases with the strain rate. However, based on the results of isothermal tensile tests of as-quenched Al-Cu-Mn alloy in this paper, it was found that the ductility decreased apparently (approximately 90% under strain rate of 0.001/s) at a medium temperature range (573-673K) and gradually reincreased to its original level at higher temperature. A competitive relationship between temperature softening and grain boundary T precipitation was proposed to account for the unusual variation of ductility. In addition, a ductility model based on the competitive relationship was deduced to quantify the evolution of the fracture strain for the as-quenched Al-Cu-Mn alloy and validated by the experimental results.

Ductility grain boundary precipitation thermal softening quenching Al-Cu-Mn alloy

SCI ; EI

英语

其他

National Natural Science Foundation of China[U1537202]

Materials Science ; Mechanics

Materials Science, Multidisciplinary ; Mechanics

WOS:000430072300008

SAGE PUBLICATIONS LTD

20181605035153

Ductility ; Fracture ; Grain boundaries ; Precipitation (chemical) ; Quenching ; Strain rate ; Tensile testing

Heat Treatment Processes:537.1 ; Manganese and Alloys:543.2 ; Chemical Operations:802.3 ; Materials Science:951

ENGINEERING

Web of Science

1.Tsinghua Univ, Dept Mech Engn, State Key Lab Tribol, Beijing, Peoples R China
2.Tsinghua Univ, Inst Mfg Engn, Beijing, Peoples R China
3.Tsinghua Univ, Beijing Key Lab Precis Ultra Precis Mfg Equipment, Beijing, Peoples R China
4.Worcester Polytech Inst, Dept Mfg Engn, Worcester, MA 01609 USA
5.South Univ Sci & Technol China, Mech & Energy Engn Dept, Shenzhen, Peoples R China

Wang, Wenguang,Wang, Gang,Guo, Guannan,et al. Competitive relationship between thermal effect and grain boundary precipitates on the ductility of an as-quenched Al-Cu-Mn alloy[J]. INTERNATIONAL JOURNAL OF DAMAGE MECHANICS,2018,27(5):779-798.

Wang, Wenguang,Wang, Gang,Guo, Guannan,&Rong, Yiming.(2018).Competitive relationship between thermal effect and grain boundary precipitates on the ductility of an as-quenched Al-Cu-Mn alloy.INTERNATIONAL JOURNAL OF DAMAGE MECHANICS,27(5),779-798.

Wang, Wenguang,et al."Competitive relationship between thermal effect and grain boundary precipitates on the ductility of an as-quenched Al-Cu-Mn alloy".INTERNATIONAL JOURNAL OF DAMAGE MECHANICS 27.5(2018):779-798.