Abstract
Deformation-induced martensitic transformations are increasingly being used to create desirable mechanical properties in steels. Here, the kinetics of the deformation-induced martensitic transformation is investigated at 300, 263, 223, 173 and 100 K using in situ neutron diffraction during tensile loading. The results from these experiments show a distinct change in the transformation behaviour between 300 K and the tests conducted at 263 K and below, causing a difference in martensite structure. The difference in transformation kinetics is correlated to the suppression of slip at low temperatures, as evidenced using diffraction peak intensity analysis for different grain families and corroborated using transmission electron microscopy. A direct correlation between the deformation-induced martensite fraction and the work-hardening rate is shown.
| Original language | English |
|---|---|
| Pages (from-to) | 2114-2125 |
| Number of pages | 12 |
| Journal | Materials Science and Technology (United Kingdom) |
| Volume | 34 |
| Issue number | 17 |
| Early online date | 22 Aug 2018 |
| DOIs | |
| Publication status | Published - 22 Nov 2018 |
Funding
MEF is grateful for funding from the Lloyd’s Register Foundation, a charitable foundation helping to protect life and property by supporting engineering-related education, public engagement and the application of research. THS acknowledges support from the European Regional Development Fund via the Ser Cymru II: [Grant Number 80761-SU-098] fellowship program.
Keywords
- martensite
- Neutron diffraction
- solid-state transformation
- TRIP steel
- work hardening
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
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