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Influence of impact energy on work hardening ability of austenitic manganese steel and its mechanism

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China Foundry 2012年第3期9卷 248-251页

作者： Li Xiaoyun Wu Wei Zu Fangqiu Liu Lanjun Zhang Xianfeng Engineering Training Center Hefei University of Technology Hefei 230601 China School of Materials Science and Engineering Hefei University of Technology Hefei 230009 China

To further understand the hardening mechanism of austenitic manganese steel under actual working conditions, the work hardening ability was studied and the microstructures of austenitic manganese steel were observed under different impact energies. The work hardening mechanism was also analyzed. The results show that the best strain hardening effect could be received only when the impact energy reaches or exceeds the critical impact energy. The microstructural observations reveal that dislocations, stacking faults and twins increase with raising impact energy of the tested specimens. The hardening mechanism changes at different hardening degrees. It is mainly dislocation and slip hardening below the critical impact energy, but it changes to the twinning hardening mechanism when the impact energy is above the critical impact energy.

关键词： austenitic manganese steel work hardening impact energy microstructure hardening mechanism

Modifying Effect of Rare Earths and Titanium on austenitic manganese steel

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Journal of Rare Earths 1997年第4期15卷 46-50页

作者：朱瑞富吕宇鹏李士同朝志强王世清张福成

By means of thermodynamic calculations, optical microscope, sweep electron microscope(SEM), transimssion electron microscope(TEM) and microcomposition detection, the modifying effect of RE and Ti on austenitic manganese steel was investigated The results show that the constitutional supercooling of austenitic manganese steel during solidification can be improved and the dendritic crystals can be grown facilely, melted, isolated and multiplied by adding RE(Ce) In the melt the alloying elements Ti and C can form TiC directly which acts as nucleus of cementite and causes both primary and eutectic cementite to be granulated and refined so that the cementite network in this steel can be eliminated

关键词： Rare earths TiC Modifying effect austenitic manganese steel

Mechanism of Work-hardening for austenitic manganese steel under Non-severe Impact Loading Conditions

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Journal of Materials Science & Technology 1992年第6期8卷 406-410页

作者：谢敬佩姜启川何镇明 hun(罗全顺) K.Sommer Luoyang Institute of Technology Luoyang471039China Stuttgart University Germany

The effect of C,Mn and heat-treatment on work-hardening of austenitic Mn steel and the work-hardening mechanism have been investigated under non-severe impact loading *** results show that the ability of work-hardening in- creases with the increase of C and aging tempera- ture but decreases with *** work-hardening with high austenitic stability results mainly from dislocations,and that with low austenitic stability results mainly from combined effects of strain-in- duced martensite and high density of dislocations under non-severe impact loading *** wear resistance of medium manganese steel (Mn7) is 1.64-2.46 times that of Hadfield steel (Mnl3).

关键词： austenitic manganese steel mechanism of work-hardening

Micromechanical modeling of polycrystalline high manganese austenitic steel subjected to abrasive contact

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Friction 2020年第3期8卷 626-642页

作者： Matti LINDROOS Anssi LA UKK ANEN Tom ANDERSSON VTT Lifecycle Solutions Tampere 33720Finland

This study focuses on microstructural and micromechanical modeling of abrasive sliding contacts of wear-resistant Hadfield steel.3 D finite element representation of the microstructure was employed with a crystal plasticity model including dislocation slip,deformation twinning,and their *** results showed that deformation twinning interacting with dislocations had a key role in the surface hardening of the material,and it was also important for the early hardening process of the sub-surface grains beyond the heavily distorted surface *** effects of grain orientation and microstructural features were discussed and analyzed according to the micromechanical model to give a perspective to the anisotropy of the material and the feasibility of using micromechanics in virtual material design.

关键词： crystal plasticity micromechanical modeling of abrasion austenitic manganese steel deformation twinning

STUDY ON THE MICROSTRUCTURAL CHANGES OF austenitic manganese steelS DURING ABRASION

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Progress in Natural Science:Materials International 1992年第1期 32-38页

作者：金占明 National Tribology Laboratory Tsinghua University Beijing 100084 PRC

The shapes, microstructural changes of debris and the wear mechanism of several austeniticmanganese steels during abrasion are investigated by X-ray diffractometer, SEM and computer imageprocessing system. It is concluded that the initial hardness of the austenitic manganese steels cannot beused to predict the wear resistance. The γ-α′ transformation of the austenitic manganese steel is observedin non-impact abrasion, and furthermore it is found that the γ-α′ transformation is favored with theincreasing austenite stability and the decreasing load.

关键词： austenitic manganese steel debris γ-α'transformation