[Kovove materialy - Metallic materials]
    Thu - October 29, 2020 - 20:41 No. of hits : 1186702 ISSN 1338-4252 (online) ISSN 0023-432X (printed)
© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 58 (2020), Issue 1

Tensile deformation behavior of dual-phase steels at elevated temperatures
vol. 58 (2020), no. 1, pp. 1 - 12

In this study, two distinct grades of commercial steel, DP600 and DP800, were thermo-mechanically tested relevant to mechanical behavior at five temperatures and two elongation rates. Some fundamental structural properties were also determined, including work (strain) hardening, strain rate sensitivity, and optimum ranges of forming temperatures. For both high-quality steels, tensile strength and flow stress noticeably decreased as work temperature increased. The maximum work hardening ratio for both strain rates was exhibited at 350 °C for DP600 and at 300 °C for DP800. Deformation velocity effects for the DP600 occurred at 500 °C, whereas they manifested at 400 and 500 °C for DP800. In the warm deep drawing tests, the optimum forming temperature for DP600 was 400 °C, while it was 450 °C for DP800, taking into account the deformation velocity of both steels. It was concluded that a controllable and feasible manufacturing alternative is possible using local warm forming.

Key words
advanced high-strength (AHSS), DP600, DP800, tensile test, warm forming

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.

Article abstracts updated: 2020-10-28 11:33      
Articles in press revised: 2020-10-23 07:15     
Full text pdf uploaded: 2020-09-09 09:44    
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