THE EFFECT OF THERMO-MECHANICAL LOADING ON THE MICROSTRUCTURE EVOLUTION IN NEAR-PEARLITIC STEEL
Paper i proceeding, 2025

Block braking generates elevated temperatures accompanied with mechanical loading in railway wheels. This paper aims to characterise the mechanical behaviour and microstructure of near-pearlitic railway wheel web material and compare it to previous rim material results. Thermo-mechanical loadings with peak temperatures of 300°C and 650°C were applied corresponding to the simulated worst-case scenario for the wheel web and rim materials respectively. Thermal dilatation was restricted to various levels ranging from free expansion to full restriction. While effects are limited at peak temperature 300°C, overheating of the wheel steel to 650°C has large effects on stress response and tensile residual stress.

heat treatment

spheroidization

thermo-mechanical fatigue TMF

Railway wheel steel

pearlitic microstructure

Författare

Johan Ahlström

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Tsering Wangmo

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Nils Emil Fredrik Nordström

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Erika Steyn

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

CM2025 - 13th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems. Conference proceedings

13th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems CM2025
Tokyo, Japan,

Modellering av egenskaper och skador i hjul- och rälmaterial (CHARMEC MU30)

Chalmers järnvägsmekanik (CHARMEC), 2013-04-01 -- 2021-06-30.

IAM4RAIL

Trafikverket (2023/9635), 2023-01-01 -- 2026-02-28.

Ämneskategorier (SSIF 2025)

Metallurgi och metalliska material

Solid- och strukturmekanik

Fysik

Teknisk mekanik

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Materialvetenskap

Fundament

Grundläggande vetenskaper

Mer information

Senast uppdaterat

2025-10-16