In-situ study of strain and texture evolution during continuous strain path change

Sisir Dhara; Scott Taylor; Łukasz Figiel; Darren Hughes; Barbara Shollock; Sumit Hazra

doi:10.25518/esaform21.2168

In-situ study of strain and texture evolution during continuous strain path change

Sisir Dhara^*, Scott Taylor, Łukasz Figiel, Darren Hughes, Barbara Shollock, Sumit Hazra

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

1 Citation (Scopus)

Abstract

Automotive stamping is a multi-stage process where a sheet material is drawn in first stage and then redrawn, flanged and pierced in subsequent stages. In the first draw stage, continuous strain path change is induced in the material while a discontinuous strain path change occurs when the material is processed in the subsequent stages of a multi-stage stamping operation. The strain path transition can potentially alter the forming limit of the material. Previous research has investigated the effect of the discontinuous mode of strain path change by loading the sample in one strain path, unloading it, then reloading it in a second path. Thus, discontinuous strain path change was obtained. In this work, the effect of continuous strain path change was investigated with a novel experimental design that allowed cruciform samples to change strain path continuously without unloading. The work was carried out in two stages. In the first stage, the design of the cruciform sample was verified with finite element modelling to ensure the occurrence of continuous strain path change and this was validated experimentally using DX54 material by capturing full-field strain measurements data using digital image correlation technique. The size of the experimental apparatus permitted it to be placed inside a scanning electron microscope chamber. In the second stage, the validated test method was used to evaluate microstructural changes during the deformation including full-field strain and texture evolution. The micro-strain evolution showed rotation of strain bands while the texture evolution conveyed grain rotation during continuous strain path change.

Original language	English
Title of host publication	ESAFORM 2021 - 24th International Conference on Material Forming
Publisher	PoPuPS (University of LiFge Library)
ISBN (Electronic)	9782870193020
DOIs	https://doi.org/10.25518/esaform21.2168
Publication status	Published - 2021
Event	24th International ESAFORM Conference on Material Forming, ESAFORM 2021 - Virtual, Online, Belgium Duration: 14 Apr 2021 → 16 Apr 2021

Publication series

Name	ESAFORM 2021 - 24th International Conference on Material Forming

Conference

Conference	24th International ESAFORM Conference on Material Forming, ESAFORM 2021
Country/Territory	Belgium
City	Virtual, Online
Period	14/04/2021 → 16/04/2021

Keywords

Continuous strain path change
Finite element modelling
In-situ DIC and EBSD
In-situ strain evolution
In-situ texture evolution

Access to Document

10.25518/esaform21.2168

Cite this

Dhara, S., Taylor, S., Figiel, Ł., Hughes, D., Shollock, B., & Hazra, S. (2021). In-situ study of strain and texture evolution during continuous strain path change. In ESAFORM 2021 - 24th International Conference on Material Forming Article 2168 (ESAFORM 2021 - 24th International Conference on Material Forming). PoPuPS (University of LiFge Library). https://doi.org/10.25518/esaform21.2168

@inbook{4688de7b4f694567b023e327d090d538,

title = "In-situ study of strain and texture evolution during continuous strain path change",

abstract = "Automotive stamping is a multi-stage process where a sheet material is drawn in first stage and then redrawn, flanged and pierced in subsequent stages. In the first draw stage, continuous strain path change is induced in the material while a discontinuous strain path change occurs when the material is processed in the subsequent stages of a multi-stage stamping operation. The strain path transition can potentially alter the forming limit of the material. Previous research has investigated the effect of the discontinuous mode of strain path change by loading the sample in one strain path, unloading it, then reloading it in a second path. Thus, discontinuous strain path change was obtained. In this work, the effect of continuous strain path change was investigated with a novel experimental design that allowed cruciform samples to change strain path continuously without unloading. The work was carried out in two stages. In the first stage, the design of the cruciform sample was verified with finite element modelling to ensure the occurrence of continuous strain path change and this was validated experimentally using DX54 material by capturing full-field strain measurements data using digital image correlation technique. The size of the experimental apparatus permitted it to be placed inside a scanning electron microscope chamber. In the second stage, the validated test method was used to evaluate microstructural changes during the deformation including full-field strain and texture evolution. The micro-strain evolution showed rotation of strain bands while the texture evolution conveyed grain rotation during continuous strain path change.",

keywords = "Continuous strain path change, Finite element modelling, In-situ DIC and EBSD, In-situ strain evolution, In-situ texture evolution",

author = "Sisir Dhara and Scott Taylor and {\L}ukasz Figiel and Darren Hughes and Barbara Shollock and Sumit Hazra",

note = "Publisher Copyright: {\textcopyright} ESAFORM 2021 - 24th Inter. Conf. on Mat. Forming. All rights reserved.; 24th International ESAFORM Conference on Material Forming, ESAFORM 2021 ; Conference date: 14-04-2021 Through 16-04-2021",

year = "2021",

doi = "10.25518/esaform21.2168",

language = "English",

series = "ESAFORM 2021 - 24th International Conference on Material Forming",

publisher = "PoPuPS (University of LiFge Library)",

booktitle = "ESAFORM 2021 - 24th International Conference on Material Forming",

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Dhara, S, Taylor, S, Figiel, Ł, Hughes, D, Shollock, B & Hazra, S 2021, In-situ study of strain and texture evolution during continuous strain path change. in ESAFORM 2021 - 24th International Conference on Material Forming., 2168, ESAFORM 2021 - 24th International Conference on Material Forming, PoPuPS (University of LiFge Library), 24th International ESAFORM Conference on Material Forming, ESAFORM 2021, Virtual, Online, Belgium, 14/04/2021. https://doi.org/10.25518/esaform21.2168

In-situ study of strain and texture evolution during continuous strain path change. / Dhara, Sisir; Taylor, Scott; Figiel, Łukasz et al.
ESAFORM 2021 - 24th International Conference on Material Forming. PoPuPS (University of LiFge Library), 2021. 2168 (ESAFORM 2021 - 24th International Conference on Material Forming).

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

TY - CHAP

T1 - In-situ study of strain and texture evolution during continuous strain path change

AU - Dhara, Sisir

AU - Taylor, Scott

AU - Figiel, Łukasz

AU - Hughes, Darren

AU - Shollock, Barbara

AU - Hazra, Sumit

PY - 2021

Y1 - 2021

N2 - Automotive stamping is a multi-stage process where a sheet material is drawn in first stage and then redrawn, flanged and pierced in subsequent stages. In the first draw stage, continuous strain path change is induced in the material while a discontinuous strain path change occurs when the material is processed in the subsequent stages of a multi-stage stamping operation. The strain path transition can potentially alter the forming limit of the material. Previous research has investigated the effect of the discontinuous mode of strain path change by loading the sample in one strain path, unloading it, then reloading it in a second path. Thus, discontinuous strain path change was obtained. In this work, the effect of continuous strain path change was investigated with a novel experimental design that allowed cruciform samples to change strain path continuously without unloading. The work was carried out in two stages. In the first stage, the design of the cruciform sample was verified with finite element modelling to ensure the occurrence of continuous strain path change and this was validated experimentally using DX54 material by capturing full-field strain measurements data using digital image correlation technique. The size of the experimental apparatus permitted it to be placed inside a scanning electron microscope chamber. In the second stage, the validated test method was used to evaluate microstructural changes during the deformation including full-field strain and texture evolution. The micro-strain evolution showed rotation of strain bands while the texture evolution conveyed grain rotation during continuous strain path change.

AB - Automotive stamping is a multi-stage process where a sheet material is drawn in first stage and then redrawn, flanged and pierced in subsequent stages. In the first draw stage, continuous strain path change is induced in the material while a discontinuous strain path change occurs when the material is processed in the subsequent stages of a multi-stage stamping operation. The strain path transition can potentially alter the forming limit of the material. Previous research has investigated the effect of the discontinuous mode of strain path change by loading the sample in one strain path, unloading it, then reloading it in a second path. Thus, discontinuous strain path change was obtained. In this work, the effect of continuous strain path change was investigated with a novel experimental design that allowed cruciform samples to change strain path continuously without unloading. The work was carried out in two stages. In the first stage, the design of the cruciform sample was verified with finite element modelling to ensure the occurrence of continuous strain path change and this was validated experimentally using DX54 material by capturing full-field strain measurements data using digital image correlation technique. The size of the experimental apparatus permitted it to be placed inside a scanning electron microscope chamber. In the second stage, the validated test method was used to evaluate microstructural changes during the deformation including full-field strain and texture evolution. The micro-strain evolution showed rotation of strain bands while the texture evolution conveyed grain rotation during continuous strain path change.

KW - Continuous strain path change

KW - Finite element modelling

KW - In-situ DIC and EBSD

KW - In-situ strain evolution

KW - In-situ texture evolution

UR - http://www.scopus.com/inward/record.url?scp=85119367387&partnerID=8YFLogxK

U2 - 10.25518/esaform21.2168

DO - 10.25518/esaform21.2168

M3 - Conference paper

AN - SCOPUS:85119367387

T3 - ESAFORM 2021 - 24th International Conference on Material Forming

BT - ESAFORM 2021 - 24th International Conference on Material Forming

PB - PoPuPS (University of LiFge Library)

T2 - 24th International ESAFORM Conference on Material Forming, ESAFORM 2021

Y2 - 14 April 2021 through 16 April 2021

ER -

In-situ study of strain and texture evolution during continuous strain path change

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