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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Hydrogen and Magnetic Field on the Mechanical Behavior of High Strength AISI 4340 Steel
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Effect of Hydrogen and Magnetic Field on the Mechanical Behavior of High Strength AISI 4340 Steel

机译：氢和磁场对高强度AISI 4340钢力学性能的影响

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摘要

Presence of hydrogen in materials is known to affect their mechanical properties due to hydrogen embrittlement problem. Steels used in various applications are prone to be exposed to aqueous electrochemical environments, which may introduce hydrogen into the alloy. These alloys are also prone to be simultaneously exposed to magnetic field, which may affect the hydrogen embrittlement susceptibility of these alloys. Therefore, it is important to examine the effect of hydrogen and magnetic field on the mechanical behavior of iron-based alloys. In this work, the effect of hydrogen and magnetic field on the fracture behavior of high strength AISI 4340 steel was examined. Three-point bend test was used to study the fracture behavior. In all the cases, the samples tested with hydrogen charging show a drastic reduction in ductility and fracture stress values. The effect of magnetic field was seen to be negligible. The hydrogen embrittlement was characterized by a change in the fracture surface from a ductile-type fracture to a brittle cleavage-type fracture. Acoustic emission signals collected during the test corresponds to the fracture behavior.
机译：已知由于氢脆问题，材料中氢的存在会影响其机械性能。在各种应用中使用的钢易于暴露于水性电化学环境中，这可能会将氢引入合金中。这些合金也容易同时暴露于磁场中，这可能会影响这些合金的氢脆敏感性。因此，重要的是研究氢和磁场对铁基合金机械性能的影响。在这项工作中，研究了氢和磁场对高强度AISI 4340钢断裂行为的影响。采用三点弯曲试验研究断裂行为。在所有情况下，充氢测试的样品均显示出延性和断裂应力值的急剧降低。磁场的影响可以忽略不计。氢脆的特征在于断裂表面从韧性型断裂变为脆性裂解型断裂。在测试期间收集的声发射信号对应于断裂行为。

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