# Effects of Deformation Parameters on Phase Transformation of B1500HS High-Strength Steel During the Non-Isothermal Deformation Process

## TL;DR

This study examines how deformation parameters affect phase transformation in high-strength steel during non-isothermal deformation.

## Contribution

The paper reveals how deformation parameters influence martensite formation in B1500HS steel during non-isothermal processes.

## Key findings

- Higher initial deformation temperature and lower strain promote more martensite formation.
- Strain rate has minimal and non-uniform effects on martensite content and transformation temperature.
- Deformation promotes the formation of non-martensite phases in the steel.

## Abstract

To investigate the effects of deformation parameters on the phase transformation of B1500HS high-strength steel, non-isothermal deformation tests were conducted on a Thermomaster-Z thermal mechanical simulator under different conditions in this study. Qualitative and quantitative investigations were carried out by analyzing the dilatation curves, color metallograph, and hardness data of deformed specimens. The results indicate that deformation can promote the formation of non-martensite. Higher initial deformation temperature and lower strain are beneficial for obtaining more martensite in the deformed high-strength steel and leading to higher martensite transformation temperatures. Meanwhile, the variation of strain rate has relatively small effects on the content and transformation temperature of martensite, and the effects do not show a singular trend.