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首页> 外文会议>2002 World Congress on Powder Metallurgy amp; Particulate Materials Pt.5 Jun 16-21, 2002 Orlando, FI >EFFECT OF COPPER AND NICKEL ALLOYING ADDITIONS ON THE TENSILE AND FATIGUE BEHAVIOR OF SINTERED STEELS
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EFFECT OF COPPER AND NICKEL ALLOYING ADDITIONS ON THE TENSILE AND FATIGUE BEHAVIOR OF SINTERED STEELS

机译：铜和镍合金添加对烧结钢的拉伸和疲劳行为的影响

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摘要

The influence of Cu and Ni on tensile and fatigue behavior of Fe-0.85Mo prealloy with 0.6% graphite addition was investigated. The transient liquid phase formed by the presence of Cu resulted in more rounded pores in the Fe-Ni-Cu alloy compared to Fe-Ni. While the total porosity was similar in both alloys, a larger fraction of secondary pores was present in the Fe-Ni-Cu. The addition of Cu resulted in an increase in proportional limit stress, ultimate tensile strength, and fatigue strength over the Cu-free alloy. The higher fatigue resistance was attributed to the enhanced solid solution strengthening provided by Cu in Fe, and the higher proportional limit in the Fe-Ni-Cu alloy, caused by the more rounded nature of the pores, and stronger Fe-Ni-Cu matrix surrounding the pores. The proportional limit stress appears to be a good indicator of fatigue strength, since it quantifies the onset of localized plasticity in these materials.
机译：研究了Cu和Ni对添加0.6％石墨的Fe-0.85Mo预合金的拉伸和疲劳行为的影响。与Fe-Ni相比，由Cu的存在形成的瞬时液相在Fe-Ni-Cu合金中导致更多的圆形孔。尽管两种合金的总孔隙率相似，但Fe-Ni-Cu中存在较大比例的次级孔。与不含铜的合金相比，铜的添加导致比例极限应力，极限抗拉强度和疲劳强度的增加。较高的抗疲劳性归因于铜在铁中提供的增强的固溶强化作用，以及铁-镍-铜合金中较高的比例极限，这是由于孔的更圆润的性质和较强的铁-镍-铜基体引起的围绕毛孔。比例极限应力似乎是疲劳强度的良好指标，因为它可以量化这些材料中局部可塑性的开始。

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