Hydrogen-trapping mechanisms of TIG-welded 316L austenitic stainless steels

被引：9

作者：

Silverstein, R. ^{[1
]}

Eliezer, D. ^{[1
]}

Boellinghaus, Th. ^{[2
]}

机构：

[1] Ben Gurion Univ Negev, Dept Mat Engn, Beer Sheva, Israel

[2] Fed Inst Mat Res & Testing, BAM, Berlin, Germany

来源：

JOURNAL OF MATERIALS SCIENCE | 2018年 / 53卷 / 14期

关键词：

THERMAL-DESORPTION SPECTROSCOPY; SIMILAR-TO-10(5) S(-1); FERRITIC STEELS; STRAIN RATES; DUPLEX; EMBRITTLEMENT; DIFFUSION; TITANIUM; ALLOYS; BEHAVIOR;

D O I：

10.1007/s10853-018-2349-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页码：10457 / 10468

页数：12

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