Study of Fractography and Overaging in Ly12 alloy

DOI

10.2991/icsmme-15.2015.22How to use a DOI?

Keywords

Aging, GP Zones, Solution Treatment, Eutectic, Grain Boundary

Abstract

This work is aimed to optimize the heat treatment parameters of Ly12 (Al-Cu-Mg) alloy for improvement in properties. Also to study the aging behavior for determination of peak strength and highlighting the limitations of over-aging (over-burning). Normal composition of the alloy is 4.0 Cu, 0.7 Mn, 0.8 Mg, 0.5 Si and balance Al. Thermal treatment process to achieve the ultimate properties is solution treatment at 500oC followed by quenching in cold water and then natural aging at room temperature for 96 hours. Main phases in this alloy are Mg2Si & CuAl2. If the heating temperature goes beyond 500oC, the over-aging of Mg2Si phase occurs. Over-aging is grouped into three categories a) slightly over-ageing b) medium over-ageing and c) serious over-ageing. In the present work samples of Al alloy were heat treated at different temperatures and then the effect of over burning on microstructure and mechanical properties was studied.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - W.Q. Khan
AU  - Q. Wang
AU  - X. Jin
PY  - 2015/11
DA  - 2015/11
TI  - Study of Fractography and Overaging in Ly12 alloy
BT  - Proceedings of the 2015 International Conference on Structural, Mechanical and Material Engineering
PB  - Atlantis Press
SP  - 94
EP  - 97
SN  - 2352-5401
UR  - https://doi.org/10.2991/icsmme-15.2015.22
DO  - 10.2991/icsmme-15.2015.22
ID  - Khan2015/11
ER  -