Influence of grain size and precipitation hardening on high cycle fatigue performance of CuNiSi alloys

被引：18

作者：

Gholami, M. ^{[1
]}

Vesely, J. ^{[2
]}

Altenberger, I. ^{[3
]}

Kuhn, H. -A. ^{[3
]}

Wollmann, M. ^{[1
]}

Janecek, M. ^{[2
]}

Wagner, L. ^{[1
]}

机构：

[1] Tech Univ Clausthal, Inst Mat Sci & Engn, Clausthal Zellerfeld, Germany

[2] Charles Univ Prague, Dept Phys Mat, Prague, Czech Republic

[3] Wieland Werke AG, Cent Lab, Res Dev, Ulm, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2017年 / 684卷

关键词：

Precipitate-free-zone (PFZ); Cu-2.5Ni-0.5Si-0.06Mg alloy; CuNi3Si1Mg; High cycle fatigue strength; SEVERE PLASTIC-DEFORMATION; THERMOMECHANICAL TREATMENTS; MECHANICAL-PROPERTIES; COPPER-ALLOYS; MICROSTRUCTURE; MG; STRENGTH; BOUNDARIES; ALUMINUM; BEHAVIOR;

D O I：

10.1016/j.msea.2016.12.082

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The objective of this study was to examine the influence of grain refinement on fatigue performance of Cu-2.5Ni-0.5Si-0.06Mg alloy (hereinafter referred to as CuNi3Si1Mg). The results indicate that the fatigue strength of the ultrafine-grained (UFG) CuNi3Si1Mg is about 1.6 times higher than the fatigue strength of the coarse-grained (CG) CuNi3Si1Mg. A detailed investigation of the fracture surfaces using scanning electron microscopy (SEM) showed that the initial microstructure affects the fatigue crack nucleation mechanism. In CG CuNi3Si1Mg, the cracks originated from the activated slip bands, while in UFG CuNi3Si1Mg, the cracks nucleated from the slip bands and twin boundaries.

引用

页码：524 / 533

页数：10

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