Rapid thermomechanical tempering of iron–carbon martensite
Artikel i vetenskaplig tidskrift, 2014

Tempering of martensite under simultaneous compressive stress has been studied within the temperature range of 20–400 deg C. Resistive heating was utilised to obtain rapid heating and cooling cycles of a few seconds. Material was obtained from a medium carbon pearlitic railway wheel steel, quench hardened to obtain martensitic structure. Above approx 150 deg C dilatation effects were observed below the global yielding point of the material. Microstraining around dislocations in the body centred tetragonal crystallographic structure or viscous flow at higher temperatures was a probable explanation to this material behaviour. Hence, external stress may have an important influence on the tempering progression of martensitic steel. The trials also showed that tempering of martensite progresses fast, is near instantaneous and is independent of the presence of external stress or not.

Tempering

Railway

Martensite

Resistive flash heating

Prestress

Författare

Krste Cvetkovski

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Johan Ahlström

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Christer Persson

Chalmers, Material- och tillverkningsteknik, Materialteknologi

Materials Science and Technology

0267-0836 (ISSN)

Vol. 30 1832-1834

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Materialvetenskap

Fundament

Grundläggande vetenskaper

Ämneskategorier

Annan materialteknik

Den kondenserade materiens fysik

DOI

10.1179/1743284714Y.0000000505