Effect of Forming-Die Temperature on Microstructure and Mechanical Properties of AA7075 Alloy During HFQ® Process

Jiang, Yanchao; Ding, Hua; Cai, Minghui; Chen, Y.; Liu, Y.; Zhang, Y. S.

doi:10.1007/s12666-020-02146-w

Cited by 4 publications

(1 citation statement)

References 28 publications

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“…Nowadays, hot-stamped components have been used in a wider range of areas, such as B-pillar, front bumper, door side beam, and other reinforcement members [2]. With the further advance of novel techniques such as the hot forming-quenching-integrated process (HFQ®), hot stamping has shown its great potential to be applied to lighter materials such as high-strength aluminium alloys [3]. In the process of developing hot stamping techniques, it is crucial to measure the formability of the materials at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

New developments of formability evaluation methods for hot stamping

Cheng

Zhang

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Formability is an essential material property that needs to be considered when selecting materials for hot stamping applications. Due to the difficulties of achieving rapid cooling before deformation and the failure of lubricant systems, however, it is challenging to use conventional Nakajima and Marciniak tests to evaluate the formability of materials under hot stamping conditions. Recently, biaxial test methods have shown great potential to overcome this challenge. In this paper, recent developments of the biaxial test methods for formability evaluation are reviewed, including testing machines, specimen designs, specimen heating methods, testing procedures, and limit strain determination methods. Compared to the Nakajima or the Marciniak tests, the biaxial test method can provide better simulation for hot stamping conditions and it can be a promising method for evaluating the formability of sheet metals under hot stamping conditions. However, more developments such as the standardisation of the specimen designs and the limit strain determination methods, are still needed for the wide use of the biaxial test method.

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Section: Introductionmentioning

confidence: 99%