کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1282364 1497565 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analysis of martensitic transformation in 304 type stainless steels tensile tested in high pressure hydrogen atmosphere by means of XRD and magnetic induction
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Analysis of martensitic transformation in 304 type stainless steels tensile tested in high pressure hydrogen atmosphere by means of XRD and magnetic induction
چکیده انگلیسی

Tensile specimen of several 304 type stainless steels tested under pressurized hydrogen and helium atmospheres were investigated with the focus on the γ → α′ transformation as a function of Ni content. Martensite contents on the fracture surfaces increased with decreasing Ni content and were independent of the test atmosphere (He or H2) despite different macroscopic plastic deformations. This was attributed to similar plastic deformations at the crack tip which governs the γ → α′ transformation at the fracture surface. The severity of hydrogen environment embrittlement was quantified by RA measurements which is a measure of the maximum macroscopic plastic deformation. RA values in H2 decrease with decreasing Ni content and RA is almost exactly inverse proportional to the martensite content measured by Feritscope in the uniform elongation area. This implies that the influence of hydrogen of the steels investigated here is dominated by surface effects.


► Martensite contents on the fracture surfaces increased with decreasing Ni content.
► Martensite contents on the fracture surfaces were independent of the test atmosphere (He or H2).
► Plastic deformations at the crack tip govern the gamma–alpha transformation at the fracture surface.
► RA values in H2 decrease with decreasing Ni content and RA is almost exactly inverse proportional to the martensite content measured in the uniform elongation section.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 4, February 2012, Pages 3567–3572
نویسندگان
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