The Fatigue Properties of Duplex Stainless Steels: Role of Microstructure
The Fatigue Properties of Duplex Stainless Steels: Role of Microstructure
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双相不锈钢的疲劳性能：微观结构的作用
DOI：
10.4028/www.scientific.net/kem.378-379.101
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
J. Vogt
中科院分区：
文献类型：
--
作者：
J. Vogt
本文分析了显微组织对双相不锈钢低周疲劳性能的影响。在其接收状态下和在475°C下老化后研究合金。这些DSS的抗疲劳性和循环适应性强烈地受α和γ相的体积分数控制，这与化学组成特别是氮有关。结果表明，奥氏体含量高的DSS具有良好的抗疲劳性能和循环软化性能，特别是在时效条件下。铁素体和奥氏体之间的相互作用，即载荷传递，有利于提高疲劳抗力。与氮合金化似乎是一种有前途的方式来掌握一个优化的微观结构，导致高机械阻力DSS。
The paper analyzes the role of microstructure on the low cycle fatigue behaviour of duplex stainless steels. The alloys are investigated in their as received condition and after ageing at 475°C. The fatigue resistance and the cyclic accommodation of these DSS are strongly controlled by the volume fraction of α and γ "phases which is related to the chemical composition in particular nitrogen. It is shown that DSS with a high fraction of austenite present a good combination of fatigue resistance and cyclic softening especially in the aged condition. The mutual interaction between ferrite and austenite referred to load transfer is beneficial for increasing the fatigue resistance. Alloying with nitrogen appears to be a promising way to master an optimised microstructure leading to high mechanical resistant DSS.