期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 740, 期 -, 页码 364-374出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.12.045
关键词
Aluminium-lithium alloy; Precipitation; Mechanical properties; Microstructure; Transmission electron microscopy
资金
- UGC-New Delhi
In the present study, influence of Scandium (Sc) content (0.025 and 0.25 wt%) on microstructure, texture and mechanical properties of a thermo-mechanically processed AA2195 alloy has been investigated. Addition of Sc to AA2195 alloy results in grain refinement and enhanced precipitation kinetics. TEM analysis revealed the presence of Al-3(Sc,Zr) dispersoids in the Sc containing AA2195 alloys. Solution treatment and peak aging of the Sc containing alloys revealed partially recrystallized microstructure. Texture of Sc containing alloys displayed weaker Brass component compared to the Sc free material. A clear improvement in hardness and strength was observed which could be attributed to grain refinement as well as the presence of fine Al-3(Sc,Zr) dispersoids. Ductility decreased slightly on Sc addition and there was an associated change in fracture mode as a result of Sc addition. (C) 2017 Elsevier B.V. All rights reserved.
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