Revealing effect of aluminum alloying on work hardening and impact behaviors of low-density Fe-18Mn-1.3C-2Cr-(4,11)Al casting steel  

作　　者：Zhi-bin Zheng Hao-kun Yang A.P.Shatrava Wai-wah Lai Jun Long Kai-hong Zheng 

机构地区：[1]Institute of New Materials,Guangdong Academy of Sciences,Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application,Guangzhou 510650,China [2]Smart Manufacturing Division,Hong Kong Productivity Council,Hong Kong 999077,China [3]Physicotechnological Institute of Metals and Alloys,National Academy of Sciences,Kiev 03142,Ukraine [4]National Engineering Research Center of Powder Metallurgy of Titanium&Rare Metals,Guangdong Provincial Iron Matrix Composite Engineering Research Center,Guangzhou 510650,China

出　　处：《China Foundry》2022年第4期359-368,共10页中国铸造（英文版）

基　　金：This work was financially supported by the Guangdong Province Key Area R&D Program(Grant No.2020B0101340004);the International Science and Technology Cooperation Project of Guangdong Province(Grant No.2021A0505030051);the Innovation and Technology Fund(ITF)(Grant No.ITP/020/21AP);the Young Talent Support Project of Guangzhou Association for Science and Technology(Grant No.QT20220101075);the GDAS'Project of Science and Technology Development(Grant No.2022GDASZH-2022010103).

摘　　要：The present study designed two kinds of Fe-18Mn-1.3C-2Cr-(4,11)Al(wt.%)low-density steels.Tensile and impact tests were carried out to evaluate the work hardening and impact toughness properties via aluminum(Al)alloying control.Meanwhile,microstructure evolution and fracture morphology were investigated by X-ray diffraction(XRD),a scanning electron microscope(SEM)equipped with electron backscatter diffraction(EBSD),a transmission electron microscope(TEM),and a stereo-optical microscope(OM).It is found that the Al addition obviously promotes the dislocation planar slipping,resulting in cleavage and brittle impact fracture in 11wt.%Al steel.Besides,the microband-induced plasticity(MBIP)mechanism is found in 4wt.%Al containing steel,introducing considerable work hardening capacity and impact toughness of 156.8±17.4 J.The present study provides a direct illustration of the relationship between work hardening and impact toughness behaviors of these two low-density steels for potential application as impact-resistant components.

关 键 词：casting steel aluminum work hardening impact toughness tensile fractography impact fractography 

分 类 号：TG142[一般工业技术—材料科学与工程]