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2篇 您的检索式:作者名="BERNHART Gerard"
    题名 作者 年代 出处 被引量
155NiCrMoV7钢回火组织特征与回火温度和时间的关系显示文摘采用X射线衍射(XRD)技术,研究了55NiCrMoV7热作工具钢回火过程组织的演化规律。结果表明,随回火温度增加,残余奥氏体逐渐分解,回火碳化物为M3C和少量VC;X射线衍射马氏体(211)峰半高宽随回火温度线性下降,随回火时间呈幂指数下降关系。并建立了回火组织特征马氏体(211)峰物理半高宽与回火温度、回火时间服从B=B0.e-(Dt)m定量关系的单一模型和分段模型。张占平 齐育红 王晓俊 DELAGNES Denis BERNHART Gerard 2007材料热处理学报2007,28,2:8
2Microstructure Variation and Hardness Diminution During Low Cycle Fatigue of 55NiCrMoV7 Steel显示文摘The influence of temperature and hardness level on the cyclic behavior of 55NiCrMoV7 steel, and the microstructure variation and hardness diminution during low cycle fatigue behavior were investigated. By means of SEM and XRD, the modality of carbides and the full-width half-maximum (FWHM) of martensite (211) [M(211)] of X-ray diffraction spectrum in fatigue specimen were studied. The results showed that the cyclic stress response behavior generally showed an initial exponential softening for the first few cycles, followed by a gradual softening without cyclic softening saturation. The fatigue behavior of the steel is closely related to the hardness level. The hardness diminution and the variation of half-width M(211) are remarkably influenced by the interaction between the cyclic plastic deformation and the thermal loading when the fatigue temperature exceeds the tempering temperature of the steel.ZHANG zhan ping QI Yu-hong DELAGNES Denis BERNHART Gerard 2007Journal of Iron and Steel Research(International)2007,14,6:6
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