Dynamic response of AlSi10Mg alloy fabricated by selective laser melting

被引：92

作者：

Zaretsky, E. ^{[1
]}

Stern, A. ^{[1
]}

Frage, N. ^{[1
]}

机构：

[1] Ben Gurion Univ Negev, Dept Mat Engn, POB 653, IL-8410501 Beer Sheva, Israel

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 688卷

基金：

以色列科学基金会;

关键词：

Dynamic response; Selective laser melting; AlSi10Mg alloy; MECHANICAL-PROPERTIES; MICROSTRUCTURE; STRENGTH; BEHAVIOR;

D O I：

10.1016/j.msea.2017.02.004

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The dynamic response of selective laser melting (SLM)-processed and sand cast Al10SiMg samples were studied in a series of planar impact experiments. It was found that the dynamic response of SLM-processed alloys is virtually independent of the processing orientation. The dynamic yield strength and tensile (spall) strengths of SLM-processed material exceeds those of the cast alloy by factors of two and four, respectively. It was found that with increase in the tensile strain rate et, the fracture mode of SLM-processed material changes from apparently ductile at strain rates below (epsilon) over dot(t) approximate to 5 x 10(3) s(-1) to evidently brittle above this threshold. At approximately the same strain rate and at shear stress greater than 65 MPa, the mechanism governing the compressive (yield) strength of the SLM-processed alloy also changes from thermally-activated passage of obstacles by moving dislocations to dislocation over-barrier glide controlled by phonon viscous drag.

引用

页码：364 / 370

页数：7

共 27 条

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