PREVENTION OF WELD-DECAY IN AUSTENITIC STAINLESS STEEL BY USING SURFACE MECHANICAL ATTRITION TREATMENT

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LALEH MAJID; KARGAR FARZAD; SABOUR ROUHAGHDAM ALIREZA

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Paper Information

Journal: INTERNATIONAL NANO LETTERS (INL) Year:2012 | Volume:2 | Issue:2 Page(s): 1-6

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Title

PREVENTION OF WELD-DECAY IN AUSTENITIC STAINLESS STEEL BY USING SURFACE MECHANICAL ATTRITION TREATMENT

Author(s)

LALEH MAJID | KARGAR FARZAD | SABOUR ROUHAGHDAM ALIREZA | Issue Writer Certificate

Keywords

SURFACE MECHANICAL ATTRITION TREATMENT

GRAIN REFINEMENT

TWINS

WELDING

DEGREE OF SENSITIZATION

Abstract

SURFACE MECHANICAL ATTRITION TREATMENT (SMAT) was applied to the samples of a type AISI 304 stainless steel in order to induce GRAIN REFINEMENT as well as formation of TWINS. Transmission electron microscopy and X-ray diffraction analysis results showed that the average grain size at the surface of the SMATed sample was about 10 nm. The untreated and SMATed samples were then welded using a one-pass gas tungsten arc procedure. The heat-affected zone (HAZ) of the samples was examined by optical microscopy and corrosion tests. Results of the double loop electrochemical potentiokinetic reactivation tests showed that the DEGREE OF SENSITIZATION in the HAZ for the SMATed sample was very low as compared to that of the untreated one. The pre-SMATed sample was resistant to intergranular corrosion. This is mainly due to the formation of high density of TWINS which are not prone to carbide precipitation because of their regular and coherent atomic structure and extreme low grain boundary energy as compared with those of other grain boundaries.

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References

EFFECT OF NANOCRYSTALLINE AND TWIN BOUNDARIES ON CORROSION BEHAVIOR OF 316 STAINLESS STEEL USING SMAT

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APA: Copy

LALEH, MAJID, KARGAR, FARZAD, & SABOUR ROUHAGHDAM, ALIREZA. (2012). PREVENTION OF WELD-DECAY IN AUSTENITIC STAINLESS STEEL BY USING SURFACE MECHANICAL ATTRITION TREATMENT. INTERNATIONAL NANO LETTERS (INL), 2(2), 1-6. SID. https://sid.ir/paper/321414/en

Vancouver: Copy

LALEH MAJID, KARGAR FARZAD, SABOUR ROUHAGHDAM ALIREZA. PREVENTION OF WELD-DECAY IN AUSTENITIC STAINLESS STEEL BY USING SURFACE MECHANICAL ATTRITION TREATMENT. INTERNATIONAL NANO LETTERS (INL)[Internet]. 2012;2(2):1-6. Available from: https://sid.ir/paper/321414/en

IEEE: Copy

MAJID LALEH, FARZAD KARGAR, and ALIREZA SABOUR ROUHAGHDAM, “PREVENTION OF WELD-DECAY IN AUSTENITIC STAINLESS STEEL BY USING SURFACE MECHANICAL ATTRITION TREATMENT,” INTERNATIONAL NANO LETTERS (INL), vol. 2, no. 2, pp. 1–6, 2012, [Online]. Available: https://sid.ir/paper/321414/en

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