Nanohardness measurements for studying local mechanical properties of metals

被引：42

作者：

Kempf, M ^{[1
]}

Goken, M ^{[1
]}

Vehoff, H ^{[1
]}

机构：

[1] Univ Saarland, Dept Mat Sci, D-66041 Saarbrucken, Germany

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 1998年 / 66卷 / Suppl 1期

关键词：

D O I：

10.1007/s003390051253

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Studying local mechanical properties of metallic alloys and composites and their defect structures such as grain boundaries, cracks, and dislocations allows a better understanding and design of these structural materials. With a nanoindenting atomic force microscope (NI-AFM), which uses diamond tips, such measurements are possible on a nanometer scale. Measurements on the microstructure of superalloys are presented, where different precipitates with sizes in the range of 100 nm are characterized by their different hardness values. In addition, this new technique was used to characterize the nanohardness of the plastic zone and stress fields of cracks and grain boundaries. Therefore, crack tips of in-situ loaded bending specimens of intermetallic alloys (NiAl) were investigated. The measurements show a change in nanohardness and elasticity from the distance of interfaces.

引用

页码：S843 / S846

页数：4

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