Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 646, Issue -, Pages 431-436Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.06.126
Keywords
Magnesium alloy; AZ80-Ag; Aging behavior; Microstructural evolution; Precipitates; Mechanical properties
Categories
Funding
- Key Project of Chinese National Programs for Fundamental Research and Development (973 program) [2013CB632202]
- National Natural Science Foundation of China [51401070]
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Aging behavior and related microstructural evolution of AZ80-Ag alloy as a function of aging temperature are systematically investigated. Results show that Ag addition can significantly enhance the age-hardening response of AZ80, improving its peak hardness and shortening the time to reach the peak simultaneously. Two kinds of continuous precipitates and three kinds of discontinuous precipitates are observed under varying conditions. The volume fraction ratio of continuous precipitates to discontinuous precipitates increases with increasing aging temperature. When aged at 175 degrees C for 38 h, the whole microstructure is invaded by discontinuous precipitates and an ultimate tensile strength of 428 MPa is achieved. (C) 2015 Elsevier B.V. All rights reserved.
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