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Effect of heat trea...
Effect of heat treatment on the strain hardening behaviour of an Al-Zn-Mg alloy
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- Hörnqvist Colliander, Magnus, 1979 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Karlsson, Birger, 1941 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2013-06-11
- 2009
- Engelska.
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Ingår i: International Journal of Materials Research. - : Walter de Gruyter GmbH. - 1862-5282 .- 2195-8556. ; 100:11, s. 1574 - 1581
- Relaterad länk:
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- The strain hardening of the Al-5.2Zn-1.2Mg alloy AA7030 in different conditions has been investigated. The dislocation related strengthening was described by the Voce equation and the quantitative effects of different superposition laws have been studied. All tempers, except the over-aged, suffer from plastic instability before the geometric Considère condition is reached. This was attributed primarily to the occurrence of shear failure due to dynamic strain ageing effects. For plastic strain levels below approximately 8 %, preceding the plastic instability, the results show that the saturation stress in the under and peak-aged tempers is independent of heat treatment, whereas the kinetics of structure formation differs. Using a linear superposition law in the under and peak aged tempers has negligible effects, whereas the use of Pythagorean addition for the over-aged temper significantly decreases the goodness-of-fit, although not to unacceptable levels. Furthermore, the naturally aged temper shows strong influence of dynamic precipitation.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering (hsv//eng)
Nyckelord
- Aluminium alloys
- Al-Zn-Mg
- Precipitation hardening
- Strain hardening
- Work hardening
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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