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Modelling the influence of austenitisation temperature on hydrogen trapping in Nb containing martensitic steels

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<mark>Journal publication date</mark>1/05/2015
<mark>Journal</mark>Scripta Materialia
Volume101
Number of pages4
Pages (from-to)60-63
Publication statusPublished
Original languageEnglish

Abstract

Hydrogen trapping behaviour is investigated by means of thermokinetic simulations in a martensitic steel. The heat treatment consists of austenitisation followed by quenching and tempering. The model prescribes a minimum in hydrogen trapping at an austenitisation temperature of 1050 °C. Below this temperature, austenite grain boundaries are the prevailing trap, whereas niobium atoms in solid solution are the main traps above 1050 °C. The model describes precisely the experimental results.