Effect of r-value and texture on plastic deformation and necking behavior in interstitial-free steel sheets

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• 作者：Gyu-Jin Oh ; Kye-Man Lee ; Moo-Young Huh ; Jin Eon Park…
• 关键词：tensile test ; work hardening ; necking ; texture ; interstitial ; free steel
• 刊名：Metals and Materials International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：23
• 期：1
• 页码：26-34
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Metallic Materials; Operating Procedures, Materials Treatment; Magnetism, Magnetic Materials; Engineering Thermodynamics, Heat and Mass Transfer; Characterization and Evaluation of Materials; Continuu
• 出版者：The Korean Institute of Metals and Materials
• ISSN：2005-4149
• 卷排序：23

文摘

Three initial tensile specimens having different textures and, in consequence, different r-values were cut from a sheet of an interstitial-free steel. Using these specimens, the effect of r-value and texture on plastic deformation and the necking behavior were studied by tackling the strain state and texture during tensile tests. A reduced decrease in work hardening rate of tensile specimens with higher r-values led to a slower onset of diffuse necking which offers an increased uniform elongation. A slower reduction in thickness of specimens with a higher r-value provided a favorable resistance against onset of failure by localized necking.