Enhancement of ballistic performance enabled by transformation-induced plasticity in high-strength bainitic steel

作     者：Min Cheoljo Selim Kim Dong Woo Suh Hong Kyu Kim Yongjin Kim Seok Su Sohn Sunghak Lee Min Cheol Jo;Selim Kim;Dong Woo Suh;Hong Kyu Kim;Yong Jin Kim;Seok Su Sohn;Sunghak Lee

作者机构：Center for Advanced Aerospace MaterialsPohang University of Science and TechnologyPohang37673South Korea Graduate Institute of Ferrous TechnologyPohang University of Science and TechnologyPohang37673South Korea Materials DirectorateAgency for Defense DevelopmentDaejeon305-600South Korea Department of Materials Science and EngineeringKorea UniversitySeoul02841South Korea 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第84卷第25期

页      面：219-229页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Agency for Defense Development(grant No.UE161030GD) the Korea University Grant for Dr.S.S.Sohn the BK21 Plus Project for Center for Creative Industrial Materials 

主　　题：High-strength bainitic steel Ballistic performance Split Hopkinson pressure bar(SHPB) Adiabatic shear band(ASB) Retained austenite(RA) Transformation-induced plasticity(TRIP) 

摘      要：High-strength bainitic steels have created a lot of interest in recent times because of their excellent combination of strength,ductility,toughness,and high ballistic mass *** steels have great potential in the fabrication of steel armor *** various approaches and methods have been conducted to utilize the retained austenite(RA)in the bainitic matrix to control mechanical properties,very few attempts have been conducted to improve ballistic performance utilizing transformationinduced plasticity(TRIP)*** this study,high-strength bainitic steels were designed by controlling the time of austempering process to have various volume fractions and stability of RA while maintaining high *** dynamic compressive and ballistic impact tests were conducted,and the relation between the effects of TRIP on ballistic performance and the adiabatic shear band(ASB)formation was *** results show for the first time that an active TRIP mechanism achieved from a large quantity of metastable RA can significantly enhance the ballistic performance of high-strength bainitic steels because of the improved resistance to ASB ***,the ballistic performance can be effectively improved by a very short austempering time,which suggests that the utilization of active TRIP behavior via tuning RA acts as a primary mechanism for significantly enhancing the ballistic performance of high-strength bainitic steels.