Deformation and fatigue behaviour of additively manufactured Scalmalloy? with bimodal microstructure

被引：17
作者：
Schimbaeck, D. [1 ]
Kaserer, L. [2 ]
Mair, P. [2 ]
Palm, F. [3 ]
Leichtfried, G. [2 ]
Pogatscher, S. [1 ]
Hohenwarter, A. [4 ]
机构：
[1] Univ Leoben, Chair Nonferrous Met, Leoben, Austria
[2] Univ Innsbruck, Fac Engn Sci, Dept Mechatron, Mat Sci, Innsbruck, Austria
[3] Airbus Def & Space GmbH, Airbus Cent R&T, Taufkirchen, Germany
[4] Univ Leoben, Dept Mat Sci, Leoben, Austria
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 172卷
关键词：
Additive Manufacturing; Scalmalloy; Fatigue properties; Fracture Mechanics; Microstructure; MECHANICAL-PROPERTIES; CRACK-GROWTH; GRAIN-SIZE; STRENGTH; ALUMINUM; ALLOY; PROPAGATION; DEPENDENCE; DUCTILITY; FRACTURE;
D O I：
10.1016/j.ijfatigue.2023.107592
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Laser powder bed fusion produced Scalmalloy (R) is a high potential candidate in aerospace industry. However, fatigue properties are the Achilles heel of additive manufacturing process, impeding high-performance fatigue loaded applications. This paper aims to unveil the impact of unique bimodal microstructure on the quasi-static tensile and the fatigue properties. It is shown that the material intrinsic fatigue strength of Scalmalloy (R) outperforms its additively manufactured aluminium counterparts significantly, already reaching values of additively manufactured Ti-6Al-4V. Moreover, by evaluating the R-curve for Scalmalloy (R), short crack growth was also taken into consideration for the analysis of the fatigue behaviour, elaborating an advanced Kitagawa-Takahashi diagram.
引用
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页数：14
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