The Effect Of Grain Size On The Mechanical Properties Of Aluminum

Archives of Metallurgy and Materials

J. Park¹  G. Jeong¹  H. Choi¹  S. Nam¹  J. Shin²  D. Bae²  S.-E. Shin² 

[1] SCHOOL OF ADVANCED MATERIALS ENGINEERING, KOOKMIN UNIVERSITY, SEOUL, REPUBLIC OF KOREA;SCHOOL OF ADVANCED MATERIALS ENGINEERING, YONSEI UNIVERSITY, SEOUL, REPUBLIC OF KOREA

关键词: Keywords: Nanocrystalline aluminum;    Grain size;    Tensile behavior;    Microstructure;    Mechanical properties;   

DOI  :  10.1515/amm-2015-0115

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

Although many studies have focused on the unique plastic deformation behavior of nanocrystalline aluminum (e.g., the positive deviation from Hall-Petch relation, the unusual yield-drop phenomenon in tensile mode, etc.), the data reported by different research groups are inconsistent with each other, possibly because of different fabrication processes. In this study, aluminum samples with a wide grain-size spectrum – from a few micrometers down to 100 nanometers – are manufactured by powder metallurgy. The grain size was measured by X-ray diffraction analysis and transmission electron microscope observation. Furthermore, the tensile behavior, which varied according to a grain size, is discussed with a comparison of the theoretical models.

【 授权许可】

Unknown