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Effects of adiabatic heating estimated from tensile tests with continuous heating

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Details

Original languageEnglish
Title of host publicationDynamic Behavior of Materials - Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics
PublisherSpringer New York LLC
Pages1-7
Number of pages7
Volume1
ISBN (Print)9783319629551
DOIs
Publication statusPublished - 2018
Publication typeA4 Article in a conference publication
EventAnnual Conference and Exposition on Experimental and Applied Mechanics -
Duration: 1 Jan 2000 → …

Publication series

NameConference Proceedings of the Society for Experimental Mechanics
ISSN (Print)2191-5644

Conference

ConferenceAnnual Conference and Exposition on Experimental and Applied Mechanics
Period1/01/00 → …

Abstract

The mechanical behavior of metastable austenitic stainless steels is strongly influenced by the strain induced phase transformation of austenite into martensite. The phase transformation rate is significantly affected by the strain rate and by the adiabatic heating at higher strain rates. Uncoupling of the effects of strain rate and adiabatic heating can lead to a better understanding of the strain-induced martensitic transformation and allow more accurate material modeling. This paper presents a preliminary analysis of the effects of adiabatic heating during a tensile test. The adiabatic heating as a function of strain was calculated from the stress-strain curves obtained in adiabatic conditions. Then the tensile tests were carried out at a lower strain rate while continuously heating the specimen at the same rate as obtained in the adiabatic conditions. With this method, the thermal conditions of the adiabatic tests were reproduced in the low rate conditions, which would normally be isothermal without the external heating. The martensite fraction was evaluated using the magnetic balance method. In this paper, we present a detailed description of the experimental procedure and discuss the observed changes in the mechanical behavior and microstructure of the studied steel.

Keywords

  • Adiabatic heating, Magnetic balance method, Martensite transformation, Metastable austenite, Stainless steel

Publication forum classification

Field of science, Statistics Finland