Metal Working: Stretching of Sheets

Doege, E.; Hallfeld, T.

doi:10.1016/b0-08-043152-6/00964-5

Cited by 5 publications

(2 citation statements)

References 2 publications

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“…Strain hardening occurs during the deformation of materials and characterized by strain hardening exponent – n. Strain hardening exponent is an indicator of formability of sheet metals and is used in many analytical formulations describing the deformation [29]. Sheet metals that show a mechanical behaviour with high –n exponents can distribute the local work hardening throughout the sheet and result in uplifting the forming limit diagram (FLD) in plane strain condition, which is the most severe condition in terms of formability [30]. Even though in many cases, the strain hardening exponent –n is assumed to be constant throughout the deformation, it may not be true, for that, it actually varies during deformation.…”

Section: Resultsmentioning

confidence: 99%

Detailed deformation behaviour analysis of DP steels at warm forming temperatures via warm tensile tests

Şen

Civek

2022

Ironmaking & Steelmaking

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DP advanced high strength steels (AHSSs) have an important place in automotive industry for producing parts like B-pillars, door rings, etc. However, the excellent strength of AHSSs increases the issues related to their formability. Therefore, it is necessary to implement new forming processes to fully utilize the excellent properties of DP steels in more complex parts. In this study, the formability of DP steels (DP600, DP800) and their deformation behaviour at warm forming temperatures have been investigated by a series of tensile tests conducted at elevated temperatures (75, 175, 275, 375°C) and two different strain rates (0.05, 0.005 s -1 ). To understand the deformation behaviour thoroughly, both instantaneous and average strain hardeningn and strain rate sensitivitym values, the change in the hardening capacity and the microstructure have been analyzed. The results have shown that the formability of DP steels at 375°C is more favourable as compared at room temperature.

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Section: Resultsmentioning

confidence: 99%

Detailed deformation behaviour analysis of DP steels at warm forming temperatures via warm tensile tests

Şen

Civek

2022

Ironmaking & Steelmaking

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“…The material experiences different stress conditions during deep drawing process on the flange area, cup wall area, and the bottom area. These stress conditions lead to strain forming where the material deforms and conform into the shape of the die and punch [9].…”

Section: Introductionmentioning

confidence: 99%

Factorial Analysis of Tensile Properties of Areca Leaf Sheath (ALS) Subjected to Flattening

Jong,

Nasharidan,

Abdul Rashid

et al. 2021

IJIE

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Areca leaf sheath (ALS) is a common agricultural waste produced in Southeast Asia countries, which is widely utilized over the decades to make biodegradable disposable dining wares. The workable surface of ALS for heat pressing is limited due to the concavity in the middle and folding at the edges of ALS. This study proposes that the ALS is flattened using a padding mangle prior to the forming process. The aim is to investigate the effect of ALS thickness and flattening pressure on the ultimate tensile strength and strain at break of ALS. A range of factors influencing the flattening process were investigated using design of experiment (DOE) approach based on analysis of variance (ANOVA). As the applied pressure increases, the thickness reduction of the ALS also increases. The tensile test was carried out in accordance to ASTM D3039 standard. It is found that ALS thickness and flattening pressure affect the results differently. The highest ultimate tensile strength (23.25 MPa) is obtained from 3-4 mm thick grain direction samples flattened at 5 bar; whereas the highest strain is 58.28% from perpendicular grain direction samples flattened at 1 bar, with thickness range of 3-4 mm. The results suggest that flattening process does not influence the tensile strength of ALS significantly when it is fed in parallel direction; but decreases the strain slightly.

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Effect of Pre-strain and Strain Rate on Deformation and Fracture Behavior of Automotive Grade Interstitial Free Steel Sheets

Mukhopadhyay,

Das,

Mukhopadhyay

2024

J. of Materi Eng and Perform

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Metal Working: Stretching of Sheets

Cited by 5 publications

References 2 publications

Detailed deformation behaviour analysis of DP steels at warm forming temperatures via warm tensile tests

Detailed deformation behaviour analysis of DP steels at warm forming temperatures via warm tensile tests

Factorial Analysis of Tensile Properties of Areca Leaf Sheath (ALS) Subjected to Flattening

Effect of Pre-strain and Strain Rate on Deformation and Fracture Behavior of Automotive Grade Interstitial Free Steel Sheets

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