Portevin-Le Châtelier Effect in a Powder Metallurgy Co-Ni-Based Superalloy

The Portevin-Le Châtelier (PLC) effect in a powder metallurgy (PM) Co-Ni-based superalloy was systematically investigated via the tensile tests at temperatures ranging from 200 to 600 °C and strain rates at 1.0 × 10(−4) to 1.0 × 10(−2). Both normal and inverse PLC effects were observed in the PLC re...

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Autores principales: Li, Chao, Teng, Jianwei, Yang, Biaobiao, Ye, Xianjue, Huang, Lan, Liu, Yong, Li, Yunping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9028865/
https://www.ncbi.nlm.nih.gov/pubmed/35454489
http://dx.doi.org/10.3390/ma15082796
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author Li, Chao
Teng, Jianwei
Yang, Biaobiao
Ye, Xianjue
Huang, Lan
Liu, Yong
Li, Yunping
author_facet Li, Chao
Teng, Jianwei
Yang, Biaobiao
Ye, Xianjue
Huang, Lan
Liu, Yong
Li, Yunping
author_sort Li, Chao
collection PubMed
description The Portevin-Le Châtelier (PLC) effect in a powder metallurgy (PM) Co-Ni-based superalloy was systematically investigated via the tensile tests at temperatures ranging from 200 to 600 °C and strain rates at 1.0 × 10(−4) to 1.0 × 10(−2). Both normal and inverse PLC effects were observed in the PLC regime, and the former appeared in the A and B types at a low temperature, whilst the latter appeared in the C type at an elevated temperature. Both positive and negative strain rate sensitivities (SRS) were shown in PLC regime, and SRS should be derived from same types of serrations. Based on the calculated activation energy, the substitutional atom Mo is considered to take primary responsibility for the PLC effect in present alloy.
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spelling pubmed-90288652022-04-23 Portevin-Le Châtelier Effect in a Powder Metallurgy Co-Ni-Based Superalloy Li, Chao Teng, Jianwei Yang, Biaobiao Ye, Xianjue Huang, Lan Liu, Yong Li, Yunping Materials (Basel) Article The Portevin-Le Châtelier (PLC) effect in a powder metallurgy (PM) Co-Ni-based superalloy was systematically investigated via the tensile tests at temperatures ranging from 200 to 600 °C and strain rates at 1.0 × 10(−4) to 1.0 × 10(−2). Both normal and inverse PLC effects were observed in the PLC regime, and the former appeared in the A and B types at a low temperature, whilst the latter appeared in the C type at an elevated temperature. Both positive and negative strain rate sensitivities (SRS) were shown in PLC regime, and SRS should be derived from same types of serrations. Based on the calculated activation energy, the substitutional atom Mo is considered to take primary responsibility for the PLC effect in present alloy. MDPI 2022-04-11 /pmc/articles/PMC9028865/ /pubmed/35454489 http://dx.doi.org/10.3390/ma15082796 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Chao
Teng, Jianwei
Yang, Biaobiao
Ye, Xianjue
Huang, Lan
Liu, Yong
Li, Yunping
Portevin-Le Châtelier Effect in a Powder Metallurgy Co-Ni-Based Superalloy
title Portevin-Le Châtelier Effect in a Powder Metallurgy Co-Ni-Based Superalloy
title_full Portevin-Le Châtelier Effect in a Powder Metallurgy Co-Ni-Based Superalloy
title_fullStr Portevin-Le Châtelier Effect in a Powder Metallurgy Co-Ni-Based Superalloy
title_full_unstemmed Portevin-Le Châtelier Effect in a Powder Metallurgy Co-Ni-Based Superalloy
title_short Portevin-Le Châtelier Effect in a Powder Metallurgy Co-Ni-Based Superalloy
title_sort portevin-le châtelier effect in a powder metallurgy co-ni-based superalloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9028865/
https://www.ncbi.nlm.nih.gov/pubmed/35454489
http://dx.doi.org/10.3390/ma15082796
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