Effects of Friction and Deformation Heating on Additively Manufactured M789 Steel During Hot Compression Tests

Predicting accurate high-temperatureHigh temperature mechanical propertiesMechanical properties of materialsMaterials is crucial, specifically for metalMetals additively manufactured alloys, wherein the industry standards are still being developed. For example, frictionFriction and non-isothermal conditions during high-temperatureHigh temperature compression testing often leadLead to erroneous predictions of materialMaterials properties. In this work, hot compression deformation was carried out on M789M789 steelSteel samples fabricated through laser-powder bed fusion, utilizing a Gleeble thermomechanical simulator at a temperatureTemperature range of 850–1050 °C and strain rate range of 0.01–1 s−1. The effects of frictionFriction and temperatureTemperature were accounted for by incorporating test specimen barreling and changes in the internal energy. It was observed that at a testing temperatureTemperature of 900 °C and a strain rate of 1 s−1, the effects of temperatureTemperature and frictionFriction on the flow stressFlow stress deviated by about 3.5% from experimental data. Since the determination of accurate flow stressFlow stress curves in emerging fields, such as metalMetals additive manufacturingAdditive manufacturing (AM), is crucial for advancing the development of more reliable constitutive models, it is essential to perform frictionFriction and temperature correctionsTemperature corrections during hot compression testing.