Advances in plasma technique for Hadfield-coated layers to enhance mechanical durability of R260 rail steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25510%2F25%3A39923016" target="_blank" >RIV/00216275:25510/25:39923016 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.rsurfi.2025.100477" target="_blank" >https://doi.org/10.1016/j.rsurfi.2025.100477</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.rsurfi.2025.100477" target="_blank" >10.1016/j.rsurfi.2025.100477</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Advances in plasma technique for Hadfield-coated layers to enhance mechanical durability of R260 rail steel

Popis výsledku v původním jazyce

Hadfield steel plays a critical role in high-stress railway track components. This study investigates the potential of plasma powder additive technology for rebuilding railway heavy-haul parts. A comparative analysis of different filler metals, including flux-cored wire and electrode filler metals, focuses on microstructure, mechanical properties, and heat transfer during layer formation. Plasma welding ensures structural stability, essential for dynamic strengthening and fracture toughness. Microstructural evolution is examined via optical and electron microscopy, supported by spherical indentation and Vickers hardness testing. Energy Dispersive Spectroscopy analysis identifies chemical heterogeneity and grain boundaries carbides sources. Numerical simulations provide insights into heat accumulation, optimizing technological parameters to mitigate carbide precipitation and enhance microstructural quality. Results indicate that plasma-welded samples achieve, on average, a 42 % higher indentation yield strength compared to manually welded samples. The strain-hardening exponent is also higher in plasma welding 0.4-0.6 compared to manual welding (0.2). These findings significantly advance railway welding techniques with capability to improve rail surface durability under demanding conditions.

Název v anglickém jazyce

Advances in plasma technique for Hadfield-coated layers to enhance mechanical durability of R260 rail steel

Popis výsledku anglicky

Hadfield steel plays a critical role in high-stress railway track components. This study investigates the potential of plasma powder additive technology for rebuilding railway heavy-haul parts. A comparative analysis of different filler metals, including flux-cored wire and electrode filler metals, focuses on microstructure, mechanical properties, and heat transfer during layer formation. Plasma welding ensures structural stability, essential for dynamic strengthening and fracture toughness. Microstructural evolution is examined via optical and electron microscopy, supported by spherical indentation and Vickers hardness testing. Energy Dispersive Spectroscopy analysis identifies chemical heterogeneity and grain boundaries carbides sources. Numerical simulations provide insights into heat accumulation, optimizing technological parameters to mitigate carbide precipitation and enhance microstructural quality. Results indicate that plasma-welded samples achieve, on average, a 42 % higher indentation yield strength compared to manually welded samples. The strain-hardening exponent is also higher in plasma welding 0.4-0.6 compared to manual welding (0.2). These findings significantly advance railway welding techniques with capability to improve rail surface durability under demanding conditions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Results in Surfaces and Interfaces

ISSN

—

e-ISSN

2666-8459

Svazek periodika

19

Číslo periodika v rámci svazku

May 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

100477

Kód UT WoS článku

001467294800001

EID výsledku v databázi Scopus

2-s2.0-105000280946