Effect of heat treatment conditions on the structure and mechanical properties of DP-type steel

• Autorzy: Adamczyk J. , Grajcar A.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of the paper is to determine the influence of the initial structure and heat treatment conditions on mechanical properties of DP-type steel. Design/methodology/approach: The heat treatment of the low-carbon steel in order to obtain a DP-type structure of desirable ferrite and martensite fractions was realized. In order to investigate the structure light and transmission electron microscopy methods were used. Mechanical properties were determined by means of tensile test. Findings: It was found that a different initial structure influences essentially the martensite morphology in a final DP-type structure. It can occur as a network, fine fibres or islands in a ferritic matrix of high dislocation density in the vicinity of diffusionless transformation products of austenite. The best mechanical properties (UTS=800MPa, YS0.2=520MPa, TEl=20%, UEl=16%) has a steel with the martensite in a form of fine fibres. Research limitations/implications: Continuation of the investigations in the field of using the thermomechanical processing to obtain a DP-type steel is foreseen. Practical implications: The established heat treatment conditions can be useful at manufacturing DP-type sheets of high strength and ductile properties and a good suitability for metalforming operations. Originality/value: The relationship between the initial structure and martensite morphology in DP-type steels was specified.

Słowa kluczowe

EN

heat treatment; DP-type steel; martensite; mechanical properties

PL

obróbka cieplna; stal typu DP; martenzyt; właściwości mechaniczne

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 17, nr 1-2
• Strony: 305--308
• Opis fizyczny: Bibliogr. 25 poz., rys., tab.

Twórcy

autor

Adamczyk J.

• Division of Constructional and Special Materials Engineering, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Grajcar A.

• Division of Constructional and Special Materials Engineering, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

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