On temperature and strain-rate dependence of flow serration in HfNbTaTiZr high-entropy alloy

Shuying Chen; Weidong Li; Fanchao Meng; Yang Tong; Hua Zhang; Ko-Kai Tseng; Jien-Wei Yeh; Yang Ren; Fei Xu; Zhenggang Wu; Peter K. Liaw

doi:10.1016/j.scriptamat.2021.113919

On temperature and strain-rate dependence of flow serration in HfNbTaTiZr high-entropy alloy

Shuying Chen
, Weidong Li^*
, Fanchao Meng
, Yang Tong
, Hua Zhang
, Ko-Kai Tseng
, Jien-Wei Yeh
, Yang Ren
, Fei Xu
, Zhenggang Wu^*
, Peter K. Liaw^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

38 Citations (Scopus)

Abstract

Plastic instability manifested as the serrated flow on stress-strain curves of metal alloys is generally detrimental to their processing and manufacturing. The flow serration in the HfNbTaTiZr alloy is reported in the present work and its dependence on temperatures (573-823K) and strain rates (5 × 10⁻⁵ s⁻¹-1 × 10⁻³ s⁻¹) is investigated with experiments. The notable transition of the onset strain of the serrated flow from a declining (normal behavior) to rising (inverse behavior) trend with increasing temperature at applied strain rates is modeled successfully with a theoretical framework. The success of the model in predicting the onset strain as a function of temperature and strain rate represents a possibility of theoretically constructing a process window for the alloy under examination and beyond.

Original language	English
Article number	113919
Journal	Scripta Materialia
Volume	200
Online published	16 Apr 2021
DOIs	https://doi.org/10.1016/j.scriptamat.2021.113919
Publication status	Published - 15 Jul 2021
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Research Keywords

Dynamic strain aging
High-entropy alloys
Portevin-Le Chatelier effect
Serrated flow
Theoretical modeling

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10.1016/j.scriptamat.2021.113919

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title = "On temperature and strain-rate dependence of flow serration in HfNbTaTiZr high-entropy alloy",

abstract = "Plastic instability manifested as the serrated flow on stress-strain curves of metal alloys is generally detrimental to their processing and manufacturing. The flow serration in the HfNbTaTiZr alloy is reported in the present work and its dependence on temperatures (573-823K) and strain rates (5 × 10−5 s−1-1 × 10−3 s−1) is investigated with experiments. The notable transition of the onset strain of the serrated flow from a declining (normal behavior) to rising (inverse behavior) trend with increasing temperature at applied strain rates is modeled successfully with a theoretical framework. The success of the model in predicting the onset strain as a function of temperature and strain rate represents a possibility of theoretically constructing a process window for the alloy under examination and beyond.",

keywords = "Dynamic strain aging, High-entropy alloys, Portevin-Le Chatelier effect, Serrated flow, Theoretical modeling",

author = "Shuying Chen and Weidong Li and Fanchao Meng and Yang Tong and Hua Zhang and Ko-Kai Tseng and Jien-Wei Yeh and Yang Ren and Fei Xu and Zhenggang Wu and Liaw, \{Peter K.\}",

year = "2021",

month = jul,

day = "15",

doi = "10.1016/j.scriptamat.2021.113919",

language = "English",

volume = "200",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

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TY - JOUR

T1 - On temperature and strain-rate dependence of flow serration in HfNbTaTiZr high-entropy alloy

AU - Chen, Shuying

AU - Li, Weidong

AU - Meng, Fanchao

AU - Tong, Yang

AU - Zhang, Hua

AU - Tseng, Ko-Kai

AU - Yeh, Jien-Wei

AU - Ren, Yang

AU - Xu, Fei

AU - Wu, Zhenggang

AU - Liaw, Peter K.

PY - 2021/7/15

Y1 - 2021/7/15

N2 - Plastic instability manifested as the serrated flow on stress-strain curves of metal alloys is generally detrimental to their processing and manufacturing. The flow serration in the HfNbTaTiZr alloy is reported in the present work and its dependence on temperatures (573-823K) and strain rates (5 × 10−5 s−1-1 × 10−3 s−1) is investigated with experiments. The notable transition of the onset strain of the serrated flow from a declining (normal behavior) to rising (inverse behavior) trend with increasing temperature at applied strain rates is modeled successfully with a theoretical framework. The success of the model in predicting the onset strain as a function of temperature and strain rate represents a possibility of theoretically constructing a process window for the alloy under examination and beyond.

AB - Plastic instability manifested as the serrated flow on stress-strain curves of metal alloys is generally detrimental to their processing and manufacturing. The flow serration in the HfNbTaTiZr alloy is reported in the present work and its dependence on temperatures (573-823K) and strain rates (5 × 10−5 s−1-1 × 10−3 s−1) is investigated with experiments. The notable transition of the onset strain of the serrated flow from a declining (normal behavior) to rising (inverse behavior) trend with increasing temperature at applied strain rates is modeled successfully with a theoretical framework. The success of the model in predicting the onset strain as a function of temperature and strain rate represents a possibility of theoretically constructing a process window for the alloy under examination and beyond.

KW - Dynamic strain aging

KW - High-entropy alloys

KW - Portevin-Le Chatelier effect

KW - Serrated flow

KW - Theoretical modeling

UR - https://www.scopus.com/pages/publications/85104368065

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85104368065&origin=recordpage

U2 - 10.1016/j.scriptamat.2021.113919

DO - 10.1016/j.scriptamat.2021.113919

M3 - RGC 21 - Publication in refereed journal

SN - 1359-6462

VL - 200

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 113919

ER -

On temperature and strain-rate dependence of flow serration in HfNbTaTiZr high-entropy alloy

Abstract

UN SDGs

Research Keywords

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