The interaction between short-term heat-treatment and the formability of an Al-Mg-Si alloy regarding deep drawing processes

Michael Machhammer, Christof Sommitsch

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

Research conducted in recent years has shown that heat-treatable Al-Mg-Si alloys (6xxx) have great potential concerning the design of lightweight car bodies. Compared to conventional deep drawing steels the field of application is limited by a lower formability. In order to minimize the disadvantage of a lower drawability a short-term heat-treatment (SHT) can be applied before the orming process. The SHT, conducted in selected areas on the initial blank,
leads to a local reduction of strength aiming at the decrease of critical stress during the deep drawing process. For the successful procedure of the SHT a solid knowledge about the crucial process parameters such as the design of the SHT layout, the SHT process time and the maximum SHT temperature are urgently required. It also should be noted that the storage time between the
SHT and the forming processes affects the mechanical properties of the SHT area. In this paper, the effect of diverse SHT process parameters and various storage time-frames on the major and minor strain situation of a deep drawn part is discussed by the evaluation of the forming limit diagram. For the purpose of achieving short heating times and a homogenous temperature distribution a one side contact heating tool has been used for the heat treatment in this study.
Original languageEnglish
Title of host publicationIOP Conf. Series: Materials Science and Engineering 159 (2016) 012001
DOIs
Publication statusPublished - 2016
EventConference on "Challenges in Forming High-Strength sheets" - voestalpine Stahlwelt voestalpine-Straße 4, 4020 Linz, Austria, Linz, Austria
Duration: 12 Jun 201615 Jun 2016

Conference

ConferenceConference on "Challenges in Forming High-Strength sheets"
CountryAustria
CityLinz
Period12/06/1615/06/16

Fingerprint

Deep drawing
Formability
Heat treatment
Heating
Temperature distribution
Railroad cars
Mechanical properties
Steel

Keywords

    Fields of Expertise

    • Advanced Materials Science

    Cite this

    The interaction between short-term heat-treatment and the formability of an Al-Mg-Si alloy regarding deep drawing processes. / Machhammer, Michael; Sommitsch, Christof.

    IOP Conf. Series: Materials Science and Engineering 159 (2016) 012001. 2016.

    Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

    Machhammer, M & Sommitsch, C 2016, The interaction between short-term heat-treatment and the formability of an Al-Mg-Si alloy regarding deep drawing processes. in IOP Conf. Series: Materials Science and Engineering 159 (2016) 012001. Conference on "Challenges in Forming High-Strength sheets", Linz, Austria, 12/06/16. https://doi.org/10.1088/1757-899X/159/1/012001
    Machhammer, Michael ; Sommitsch, Christof. / The interaction between short-term heat-treatment and the formability of an Al-Mg-Si alloy regarding deep drawing processes. IOP Conf. Series: Materials Science and Engineering 159 (2016) 012001. 2016.
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    abstract = "Research conducted in recent years has shown that heat-treatable Al-Mg-Si alloys (6xxx) have great potential concerning the design of lightweight car bodies. Compared to conventional deep drawing steels the field of application is limited by a lower formability. In order to minimize the disadvantage of a lower drawability a short-term heat-treatment (SHT) can be applied before the orming process. The SHT, conducted in selected areas on the initial blank,leads to a local reduction of strength aiming at the decrease of critical stress during the deep drawing process. For the successful procedure of the SHT a solid knowledge about the crucial process parameters such as the design of the SHT layout, the SHT process time and the maximum SHT temperature are urgently required. It also should be noted that the storage time between theSHT and the forming processes affects the mechanical properties of the SHT area. In this paper, the effect of diverse SHT process parameters and various storage time-frames on the major and minor strain situation of a deep drawn part is discussed by the evaluation of the forming limit diagram. For the purpose of achieving short heating times and a homogenous temperature distribution a one side contact heating tool has been used for the heat treatment in this study.",
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