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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Detalles Bibliográficos
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
Descripción
Sumario: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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