The influence of hot-working processing on plasticity and structure of duplex steel

• Autorzy: Niewielski G. , Radwański K. , Kuc D.
• Języki publikacji: EN

Abstrakty

EN

Purpose: There are numerous branches of industry where the (α + ϒ) duplex steels have not yet been sufficiently popularised due to problems with their forming, resulting from different properties of the both phases which make up the material. This paper analyses the influence of temperature and tension rate on the superplastic flow of the (α + ϒ) duplex steel. Design/methodology/approach: Steel specimens were cold deformed with a 70% rolling reduction. After a solution head treatment (1350 °C), the specimens were tensioned in temperatures ranging from 800 to 950 °C at a rate of vr=15x10 ^-3 ÷ 3x10 ^-1mm/s in a 0.005Pa vacuum. Structural examination was carried out using light, scanning and transmission electron microscopy. A quantitative analysis of structural changes was performed using the "MetIlo" image analysis programme. Findings: This paper has shown the cooperation of structure reconstruction mechanisms during deformation of the investigated steel and attempet the changes that take place in the steel structure during superplastic flow. Practical implications: The research carried out enabled the understanding of the phenomena taking place during deformation and annealing of the investigated alloy. The results will constitute the basis for modelling the structural changes. Originality/value: The results will be used to design the basis for a thermo-mechanical processing technology via rolling and inter-operational annealing of the investigated steel.

Słowa kluczowe

EN

superplastic materials; plastic forming; microstructure; hot tensile test

PL

materiały nadplastyczne; obróbka plastyczna; mikrostruktura; próba rozciągania na gorąco

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2007
• Tom: Vol. 28, nr 6
• Strony: 325--332
• Opis fizyczny: Bibliogr. 26 poz., il., wykr.

Twórcy

autor

Niewielski G.

autor

Radwański K.

autor

Kuc D.

• Faculty of Materials Science and Metallurgy, Silesian University of Technology, ul. Krasińskiego 8, 40-019 Katowice, Poland,

Bibliografia

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