A novel method based on the Seebeck effect for analyzing the behavior of the PLC band and type A serration

Autor:	Hyeok Jun Kwon, Seon Keun Oh, Hyeong Dong Kim, Young Kook Lee
Rok vydání:	2022
Předmět:	Materials science Mechanical Engineering Metals and Alloys Nucleation Condensed Matter Physics Stress (mechanics) Serration Mechanics of Materials Thermoelectric effect Ultimate tensile strength General Materials Science Composite material Deformation (engineering) Dynamic strain aging Voltage
Zdroj:	Scripta Materialia. 207:114279
ISSN:	1359-6462
DOI:	10.1016/j.scriptamat.2021.114279
Popis:	In the present study, a new technique for analyzing dynamic strain aging (DSA), which causes the Portevin-Le Chatelier (PLC) band and type A serrations in a tensile curve, was proposed. The analytical technique is based on the thermoelectric phenomenon known as the Seebeck effect. The variation of the voltage of the gauge part was monitored by the four-wire voltage measurement method during tensile tests. The voltage was additionally changed by a thermo-electromotive force induced by the local deformation heat of the PLC band, i.e. the Seebeck effect. The voltage change led to serrations in the voltage vs. strain (or time) curve. The voltage serrations more clearly exhibited the nucleation and propagation of the PLC band and a critical strain for DSA, which is crucial for investigation of the DSA mechanism, compared to stress serrations in tensile flow curves.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c5ed7aff0ade0d7a4ffc5f0969257604 https://doi.org/10.1016/j.scriptamat.2021.114279 Zobrazit plný text záznamu Full Text from ScienceDirect