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Cyclic Deformation and Fatigue Crack Behavior of Extruded AZ31B Magnesium Alloy
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Designing Local Properties of Constructional Elements by Local Use of Ageing Effects in Multiphase Steels
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Designing Local Properties of Constructional Elements by Local Use of Ageing Effects in Multiphase Steels

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Abstract:

The investigations deal with processes leading to local effects of strengthening in multiphase steels, being characterized by good formability, continuous yielding, high strength and a strong bake hardening and ageing effect. Dual phase and complex phase steels are under investigation to examine the effect of thermo-mechanical processing parameters on local ageing ability and its use for designed properties. For this purpose local heat treatment by laser are studied, as well as stability of local ageing on the adjusted strength. A remarkable increase of the hardness in the heat treated zone was observed. Stability of the local strengthening effect could be confirmed. Partial heat treatment of multiphase steels by laser can open a new field of application for the local use of the strengthening effect to influence only relevant areas, thus giving potential for energy saving.

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Periodical:

Materials Science Forum (Volumes 638-642)

Pages:

3062-3067

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.638-642.3062

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Cite this paper

Online since:

January 2010

Authors:

Mehdi Asadi, Heinz Palkowski

Keywords:

Aging, Bake Hardening, Local Deformation, Local Heat Treatment, Local Strengthening Effect, Multiphase Steel

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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References

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