On the material properties of shell plate formed by line heating

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• 作者：Hyung Kyun Lim^a ; Joo-Sung Lee^b ; ^{jslee2@ulsan.ac.kr}
• 关键词：Line heating ; Plasticity and fracture characteristics ; Diffusion necking ; Microscopic examination ; Material properties ; Water cooling
• 刊名：International Journal of Naval Architecture and Ocean Engineering
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：9
• 期：1
• 页码：66-76
• 全文大小：2648 K
• 卷排序：9

文摘

This paper is concerned with investigating the plastic material properties of steel plate formed by line heating method, and is aimed at implementing more rational design considering the accidental limit states such as collision or grounding. For the present study, line heating test for marine grade steel plate has been carried out with varying plate thickness and heating speed, and then microscopic examination and tensile test have been carried out. From the microscopic, it is found that the grain refined zones like ferrite and pearlite are formed all around the heat affected zone. From the tensile test results, it is seen that yield strength, tensile strength, fracture strain, hardening exponent and strength coefficient vary with plate thickness and heat input quantity. The formulae relating the material properties and heat input parameter should be, therefore, derived for the design purpose considering the accidental impact loading. This paper ends with describing the extension of the present study.