The Influence of Casting Microvoids on the Constitutive Behavior of As-Quenched Al-Cu-Mn Alloy

Ren, Ke1,2; Wang, Gang1; Wang, Wenguang1; Hu, Yisen1; Wang, Haidou3; Rong, Yiming2

2019

10.1007/s11665-019-04441-0

Journal of Materials Engineering and Performance   影响因子和分区

15441024

1544-1024

Microvoids, a common casting defect, have a significant effect on the mechanical properties of as-quenched aluminum alloys. In this study, low-pressure casting and quenching processes were conducted on an Al-Cu-Mn alloy to investigate the porosity variation, which was characterized by using a high-precision densimeter and x-ray microtomography. Mechanical properties were tested at elevated densities varying from 2.7828 to 2.8114 g/cm³. The Voce behavior and linear hypotheses were proposed on the relationship between the yield strength and density. A tensile constitutive model was established and validated with experimental data, and the difference between tension and compression was compared. With a decrease in density, the yield stress declined, and the tensile–compressive asymmetry increased. The ideal density, ρ, and the ideal saturated stress, σs, of the as-quenched alloy were predicted. A comparison between the quantity and volume of microvoids showed that larger pores were the main factor affecting the porosity of the as-quenched alloy. The growth of single microvoid and the coalescence of several microvoids caused an increase in porosity under tensile stress.
© 2019, ASM International.

as-quenched Al-Cu-Mn alloy constitutive model density microvoids tensile-compressive asymmetry

SCI ; EI

英语

其他

National Natural Science Foundation of China[U1537202]

Materials Science

Materials Science, Multidisciplinary

WOS:000495756600004

Springer

20194707717485

Aluminum alloys ; Constitutive models ; Copper alloys ; Density (specific gravity) ; Porosity ; Ternary alloys ; Yield stress

Aluminum Alloys:541.2 ; Manganese and Alloys:543.2 ; Copper Alloys:544.2 ; Mathematics:921 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Department of Mechanical Engineering, State Key Laboratory of Tribology and Institute of Manufacturing Engineering, Tsinghua University, Lee Shau Kee S&T Building A1003-3, Beijing; 100084, China
2.Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen; 518055, China
3.National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing; 100072, China

Ren, Ke,Wang, Gang,Wang, Wenguang,et al. The Influence of Casting Microvoids on the Constitutive Behavior of As-Quenched Al-Cu-Mn Alloy[J]. Journal of Materials Engineering and Performance,2019,28(11):6638-6648.

Ren, Ke,Wang, Gang,Wang, Wenguang,Hu, Yisen,Wang, Haidou,&Rong, Yiming.(2019).The Influence of Casting Microvoids on the Constitutive Behavior of As-Quenched Al-Cu-Mn Alloy.Journal of Materials Engineering and Performance,28(11),6638-6648.

Ren, Ke,et al."The Influence of Casting Microvoids on the Constitutive Behavior of As-Quenched Al-Cu-Mn Alloy".Journal of Materials Engineering and Performance 28.11(2019):6638-6648.