Analysis of strain rate sensitivity and strain rate hardening in Co–Cr–Ni–Mo wires drawn with different drawing practices

This study investigates the effect of strain rate (SR) on the strain rate sensitivity (SRS), strain rate work hardening (SRWH) in Co–35Ni–20Cr–10Mo alloy (MP35N) wires, subjected to drawing practices namely full die drawing (FDD) and half die drawing (HDD). The experimental results illustrate that t...

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Main Authors: Gvk, Sai Srikanth, Tan, Ming Jen, Liu, Zhenyun
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/150831
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1508312021-07-30T11:14:29Z Analysis of strain rate sensitivity and strain rate hardening in Co–Cr–Ni–Mo wires drawn with different drawing practices Gvk, Sai Srikanth Tan, Ming Jen Liu, Zhenyun School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Strain Rate Strain Rate Sensitivity This study investigates the effect of strain rate (SR) on the strain rate sensitivity (SRS), strain rate work hardening (SRWH) in Co–35Ni–20Cr–10Mo alloy (MP35N) wires, subjected to drawing practices namely full die drawing (FDD) and half die drawing (HDD). The experimental results illustrate that the strength, and SRWH, of the drawn wires, increased with the rise of SR, whereas the SRS(m) and the ductility decreased with the increase of strain rate (10⁻⁶ s⁻¹ to 10⁻² s⁻¹). However, the relative strength, hardening, and the m values were observed to be higher in the FDD drawn wire when compared to the HDD drawn wire. The increase in strength and hardening rate of the FDD drawn wire with the rise in SR was ascribed to increased dislocation density and reduced twin thickness, and the increased SRS and ductility at low SR were attributed to the increased grain boundary (GB) activities. The HDD drawn wire had a relatively lower strength, SRWH and SRS rate at an SR of 10⁻⁶ s⁻¹ when compared to other SR, this was attributed to plastic flow localization, which led to the formation of shear bands in the material. An abnormal SRWH was observed in the HDD drawn wire tested to an SR of 10⁻² s⁻¹, where a Stage II hardening peak was observed at a very high strain, this was attributed to the solute segregation of the Mo atoms to the GB. Economic Development Board (EDB) This work was supported financially by EDB (Economic Development Board) Singapore (COY-15-IPP-140010/198501914Z) under the EDB-IPP scheme through a grant to Heraeus Materials Singapore Pte Ltd Singapore. 2021-07-30T11:14:29Z 2021-07-30T11:14:29Z 2019 Journal Article Gvk, S. S., Tan, M. J. & Liu, Z. (2019). Analysis of strain rate sensitivity and strain rate hardening in Co–Cr–Ni–Mo wires drawn with different drawing practices. Metals and Materials International, 25(4), 1047-1062. https://dx.doi.org/10.1007/s12540-019-00239-w 1598-9623 0000-0002-2503-7681 https://hdl.handle.net/10356/150831 10.1007/s12540-019-00239-w 2-s2.0-85059938878 4 25 1047 1062 en COY-15-IPP-140010/198501914Z Metals and Materials International © 2019 The Korean Institute of Metals and Materials. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Mechanical engineering
Strain Rate
Strain Rate Sensitivity
spellingShingle Engineering::Mechanical engineering
Strain Rate
Strain Rate Sensitivity
Gvk, Sai Srikanth
Tan, Ming Jen
Liu, Zhenyun
Analysis of strain rate sensitivity and strain rate hardening in Co–Cr–Ni–Mo wires drawn with different drawing practices
description This study investigates the effect of strain rate (SR) on the strain rate sensitivity (SRS), strain rate work hardening (SRWH) in Co–35Ni–20Cr–10Mo alloy (MP35N) wires, subjected to drawing practices namely full die drawing (FDD) and half die drawing (HDD). The experimental results illustrate that the strength, and SRWH, of the drawn wires, increased with the rise of SR, whereas the SRS(m) and the ductility decreased with the increase of strain rate (10⁻⁶ s⁻¹ to 10⁻² s⁻¹). However, the relative strength, hardening, and the m values were observed to be higher in the FDD drawn wire when compared to the HDD drawn wire. The increase in strength and hardening rate of the FDD drawn wire with the rise in SR was ascribed to increased dislocation density and reduced twin thickness, and the increased SRS and ductility at low SR were attributed to the increased grain boundary (GB) activities. The HDD drawn wire had a relatively lower strength, SRWH and SRS rate at an SR of 10⁻⁶ s⁻¹ when compared to other SR, this was attributed to plastic flow localization, which led to the formation of shear bands in the material. An abnormal SRWH was observed in the HDD drawn wire tested to an SR of 10⁻² s⁻¹, where a Stage II hardening peak was observed at a very high strain, this was attributed to the solute segregation of the Mo atoms to the GB.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Gvk, Sai Srikanth
Tan, Ming Jen
Liu, Zhenyun
format Article
author Gvk, Sai Srikanth
Tan, Ming Jen
Liu, Zhenyun
author_sort Gvk, Sai Srikanth
title Analysis of strain rate sensitivity and strain rate hardening in Co–Cr–Ni–Mo wires drawn with different drawing practices
title_short Analysis of strain rate sensitivity and strain rate hardening in Co–Cr–Ni–Mo wires drawn with different drawing practices
title_full Analysis of strain rate sensitivity and strain rate hardening in Co–Cr–Ni–Mo wires drawn with different drawing practices
title_fullStr Analysis of strain rate sensitivity and strain rate hardening in Co–Cr–Ni–Mo wires drawn with different drawing practices
title_full_unstemmed Analysis of strain rate sensitivity and strain rate hardening in Co–Cr–Ni–Mo wires drawn with different drawing practices
title_sort analysis of strain rate sensitivity and strain rate hardening in co–cr–ni–mo wires drawn with different drawing practices
publishDate 2021
url https://hdl.handle.net/10356/150831
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