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首页> 外文会议>STP 1465; Symposium on Bearing Steel Technology-Advances and State of the Art in Bearing Steel Quality Assurance; 20050517-19; Reno,NV(US) >A Novel Method to Evaluate the Influence of Hydrogen on Fatigue Properties of High Strength Steels
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A Novel Method to Evaluate the Influence of Hydrogen on Fatigue Properties of High Strength Steels

机译：评价氢对高强度钢疲劳性能影响的新方法

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摘要

In rolling contact fatigue, hydrogen is believed to contribute to early flaking failures under some conditions. Hydrogen diffuses quickly in steels, even at room temperature, thus resulting in its dissipation into the surrounding atmosphere. This condition presents a uniquely difficult challenge for evaluating the intrinsic fatigue properties related to hydrogen embrittlement. In order to compensate for this, we employed ultrasonic fatigue testing at a loading frequency of 20 kHz, because a high loading frequency offsets the rapid hydrogen loss. In this report, the fatigue properties of hydrogen pre-charged JIS-SUJ2 (SAE52 100 equivalent) were assessed. The amount of hydrogen was quantitatively measured by thermal desorption analysis. The diffusion coefficient of hydrogen was determined via electrochemical hydrogen permeation testing. These results indicate that the magnitude of fatigue strength reduction is directly proportional to the diffusible hydrogen content. Included with this report is our proposed method for evaluating fatigue strength related to hydrogen embrittlement.
机译：在滚动接触疲劳中，据信氢在某些条件下会导致早期剥落失效。氢即使在室温下也能在钢中迅速扩散，从而导致其散发到周围的大气中。该条件为评估与氢脆相关的固有疲劳特性提出了独特的难题。为了弥补这一点，我们采用了20 kHz加载频率的超声疲劳测试，因为高加载频率可以抵消快速的氢损失。在本报告中，评估了氢预充电JIS-SUJ2（等效于SAE52 100）的疲劳性能。通过热脱附分析定量地测量氢的量。氢的扩散系数通过电化学氢渗透测试确定。这些结果表明疲劳强度降低的幅度与扩散氢含量成正比。本报告中包括我们提出的评估与氢脆相关的疲劳强度的方法。

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