パンチ加工を受けた鉄鋼材料の強度特性低下とその加工部の材質変化の関係

新留 浩太朗, 張 珂謹, 濱田 繁, 横井 龍雄, 野口 博司

研究成果: Contribution to journalArticle

抄録

<p>In steel products, the tensile strength and fatigue limit characteristics may be degraded by a punching process, and the extent of the decrease differs depending on the steel type. During static tensile loading, unstable brittle fractures can occur in the area of elastic deformation despite ductile materials. A crack along with the place with the highest shear stress first initiates when tensile loading is applied to the punched material. Furthermore, this crack initiated when a load of about two thirds of the tensile strength is applied, which is considered to charge in the tensile strength characteristics of the punched material. In the case of drill holed materials, the shear crack does not initiate. Therefore, the cause of the shear crack is considered to be in the shear-affected-zone (SAZ) by the punching process. In this study, observation of the SAZ and intermittence tensile tests were conducted on dual phase steel and precipitation harden steel to compare the two tests quantitatively. It was shown that plastic strain in the SAZ might be the cause of deterioration of the strength characteristics.</p>
寄稿の翻訳タイトルRelationship between Strength Characteristics Deterioration and Material Characteristics Change of Punching Processed Steel
本文言語Japanese
ページ(範囲)PS20
ジャーナルM&M材料力学カンファレンス
2019
0
DOI
出版ステータス出版済み - 2019

フィンガープリント 「パンチ加工を受けた鉄鋼材料の強度特性低下とその加工部の材質変化の関係」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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