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首页> 外文期刊>Journal of Materials Science >Hydrogen-trapping mechanisms of TIG-welded 316L austenitic stainless steels
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Hydrogen-trapping mechanisms of TIG-welded 316L austenitic stainless steels

机译：TIG焊接316L奥氏体不锈钢的氢捕获机制

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摘要

The interaction of hydrogen with various tungsten-inert-gas-welded austenitic stainless steels' (AUSS) microstructure is studied by means of desorption/absorption analysis and microstructure observations. One of the limitations of welding is created by the presence of hydrogen in the weld, which can shorten the steel's service life. The local hydrogen concentration, trapping, and its distribution along the welded samples were studied by thermal desorption spectrometry and were supported by X-ray diffraction (XRD) and electronic microstructural observations. Hydrogen content demonstrated a dependence on the welding zone. It was found that hydrogen distribution, and accepted microstructure during welding, played a significant role in the trapping mechanism of 316L AUSS. XRD analysis revealed residual stresses which were caused due to the presence of hydrogen in gamma-phase. It was shown that the austenite microconstituents inside 316L can have a crucial effect in preventing hydrogen-assisted cracking phenomenon. The effects of AUSS microstructure on hydrogen absorption and desorption behavior are discussed in detail.
机译：通过解吸/吸收分析和微观结构观察，研究了氢与各种钨 - 惰性气体焊接奥氏体不锈钢（ASUS）微观结构的相互作用。焊缝中存在氢气产生的焊接局限之一，这可以缩短钢铁的使用寿命。通过热解吸光谱法研究了局部氢浓度，捕获和其沿着焊接样品的分布，并由X射线衍射（XRD）和电子显微结构观察支持。氢气含量显示对焊接区的依赖性。发现焊接过程中的氢气分布和可接受的微观结构在316L澳累斯的捕获机制中起着重要作用。 XRD分析显示出由于γ相的存在而导致的残余应力。结果表明，316L内的奥氏体微核试剂可以对防止氢辅助裂缝现象具有至关重要的影响。详细讨论了αSuss微观结构对氢吸收和解吸行为的影响。

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