Correlation of Tensile Test Parameters and Bendability of High-Strength Steels

Janne Lämsä; Anu Väisänen; Jouko Heikkala; Antti Järvenpää

doi:10.4028/www.scientific.net/KEM.554-557.12

Paper Titles

Preface

Transient Negative Strain Hardening during Severe Plastic Deformation of Al-30wt%Zn Alloys
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Correlation of Tensile Test Parameters and Bendability of High-Strength Steels
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Formability of Hybrid Aluminum-Magnesium Compounds
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A Cruciform Shape to Study the Influence of Strain Paths on Forming Limit Curves
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Ductile Failure Modelling in AA5182 Aluminium Alloy Sheet Forming
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Hot Tensile Behavior of Superplastic and Commercial AA5083 Sheets at High Temperature and Strain Rate
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 554-557Correlation of Tensile Test Parameters and...

Correlation of Tensile Test Parameters and Bendability of High-Strength Steels

Abstract:

The aim of the study was to investigate correlation between bendability and tensile properties of high-strength steels. Strength and elongation in tensile test have traditionally been basic values in evaluating bending properties. Advanced high-strength (AHS) steels often have tendency for strain localization, causing risk of fractures and impairing the shape of the bend. Practice has shown that tensile test results, indicating bendability well, are not sufficiently accurate when using AHS steels. Since tensile test is a fast, simple and cheap testing method, it would be beneficial to rework it to suit better for predicting of bendability. In this study, the usability of tensile test results to predict failures in bending AHS steels has been investigated. The most common failures and failure mechanisms in bending are also presented. Test materials used were 6 mm thick AHS wear-resistant, protection and structural steels with good and poor bending properties. Minimum bending radii were determined and then compared with ten-sile test results to estimate the correlation. Conventional tensile test results, fracture surfaces and necking through width and thickness were analyzed. Correlation coefficient for measured tension properties and minimum bending radius was calculated. Results showed that in tensile test, have the best correlation with minimum bending radius with necking through the thickness and actual strain in necking area.

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Periodical:

Key Engineering Materials (Volumes 554-557)

Pages:

12-20

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.554-557.12

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Online since:

June 2013

Authors:

Janne Lämsä, Anu Väisänen, Jouko Heikkala, Antti Järvenpää

Keywords:

Bendability, High Strength Steel (HSS), Strain Localization, Tensile Test

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