Tem Observation Of Age-Hardening Precipitation In Mg-Gd-Y Alloys As Different Gd/Y Ratio

Archives of Metallurgy and Materials

J. Nakamura¹  K. Watanabe²  Y. Matsuoka²  S. Saikawa³  K. Matsuda³  S. Ikeno⁴  W. Lefebvre⁵ 

[1] DEPARTMENT OF METALLURGY, MATERIALS SCIENCE, AND MATERIALS PROCESSING, TOHOKU UNIVERSITY, SENDAI, 980-8579, JAPAN;GRADUATE SCHOOL OF SCIENCE AND ENGINEERING FOR EDUCATION, UNIVERSITY OF TOYAMA, 3190, GOFUKU, TOYAMA, 930-8555, JAPAN;GRADUATE SCHOOL OF SCIENCE AND ENGINEERING FOR RESEARCH, UNIVERSITY OF TOYAMA, 3190, GOFUKU, TOYAMA, 930-8555, JAPAN;HOKURIKU POLYTECHNIC COLLEGE, UOZU, 937-0856, JAPAN;UNIVERSITE DE ROUEN, GPM, UMR, CNRS, 6634, BP12, AVENUE DE I’UNIVERSITE, 76801, SAINT ETIENNE DU ROUVARY, FRANCE

关键词: Keywords: Mg-RE alloy;    precipitation behavior;    TEM;    HAADF-STEM;   

DOI  :  10.1515/amm-2015-0242

学科分类：金属与冶金

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

【 摘 要 】

In this study, the early stage of aging in Mg-Gd-Y alloys has been observed by transmission electron microscopy (TEM), high angle annular dark field – scanning transmission electron microscopy (HAADF-STEM) and calculations of images and electron density and bond overlap population (BOP) by first principal to understand the origin of precipitation in this alloy. The small hexagon of 0.37 nm is the first precipitate in this alloy, and this is the evidence of short range ordering of D019 structure. This is referred as the pre β”-phase. In the peak aged condition, β’ phase with bco structure was mainly observed.

【 授权许可】

Unknown