A Survey of Nanoindentation Studies on HPT-Processed Materials

被引:7
作者
Choi, In-Chul [1 ]
Jang, Jae-il [2 ]
机构
[1] Kumoh Natl Inst Technol, Sch Mat Sci & Engn, Gumi 39177, South Korea
[2] Hanyang Univ, Div Mat Sci & Engn, Seoul 04763, South Korea
基金
新加坡国家研究基金会;
关键词
high-pressure torsion; micromechanical properties; microstructural refinement; nanoindentation; STRAIN-RATE SENSITIVITY; HIGH-ENTROPY ALLOY; ULTRAFINE-GRAINED MATERIALS; HIGH-TEMPERATURE NANOINDENTATION; HIGH-PRESSURE TORSION; SEVERE PLASTIC-DEFORMATION; MECHANICAL-PROPERTIES; ZN-22-PERCENT AL; NANOCRYSTALLINE; BEHAVIOR;
D O I
10.1002/adem.201900648
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The development of high-pressure torsion (HPT) processing has increased the possibility for achieving significant grain refinement, which leads to a material's ability to produce ultrafine-grained or nanocrystalline materials having enhanced strength without a large expense of ductility at room temperature. Since the applied strain is locally changed across the sample disc during HPT, the microstructure and thus mechanical properties vary within the disc. Recently, as a promising tool for characterizing the mechanical behavior of the local regions within the disc, the nanoindentation technique becomes widely used mainly due to its simple and easy testing procedures and the requirement of only small volume of material. The nanoindentation technique provides important clues to better understand the relation between microstructural refinement and mechanical property enhancement of the HPT-processed materials. Here, the nanoindentation studies performed on various HPT-processed materials are reviewed with focus on a variety of micromechanical properties that can be estimated by nanoindentation and the interesting results are reported in the available literature.
引用
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页数:10
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