COMPARISON AND CHARACTERIZATION OF THE SURFACE STRUCTURAL OF FINE-AND ULTRAFINE-GRAINED AISI 304L AUSTENITIC STAINLESS STEELS AFTER PLASMA NITRIDING

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ESFANDIARI H.; HOSSEINI S.R.; ASHRAFIZADEH F.; KERMANPOUR A.

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Journal: IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING Year:2015 | Volume:11 | Issue:24 Page(s): 73-83

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Title

COMPARISON AND CHARACTERIZATION OF THE SURFACE STRUCTURAL OF FINE-AND ULTRAFINE-GRAINED AISI 304L AUSTENITIC STAINLESS STEELS AFTER PLASMA NITRIDING

Author(s)

ESFANDIARI H. | HOSSEINI S.R. | ASHRAFIZADEH F. | KERMANPOUR A. | Issue Writer Certificate

Keywords

AUSTENITIC STAINLESS STEELQ2

PLASMA NITRIDINGQ3

GRAIN SIZEQ2

NITRIDED LAYERQ3

DIFFUSION OF NITROGENQ3

Abstract

In this study, effect of GRAIN SIZE reduction from micrometer to ultrafine on phases and thickness of NITRIDED LAYER of AISI 304L AUSTENITIC STAINLESS STEEL after PLASMA NITRIDING was evaluated. To produce of fine GRAIN SIZE samples (11 mm) and ultrafine samples (135 nm) used cold rolling and reversion annealing of strain induced martensite. PLASMA NITRIDING was performed at 450oC for 5h and the gas composition was nitrogen and hydrogen with a ratio of 1 to 3. The evaluation of GRAIN SIZE and observation of microstructure was performed by scanning electron microscopy and identification of phases was performed by X-Ray diffractometer. An increase in the thickness of NITRIDED LAYER from 4.8 to 10.6 mm was experienced by decreasing of GRAIN SIZE from 11 mm to 135 nm. In addition to the increase of NITRIDED LAYER and percentage of precipitates in ultrafine grain samples, the type of phases was significantly affected by the GRAIN SIZE. It was observed that retained martensite after reversion annealing caused formation of iron nitride (g'-Fe4N) in ultrafine grain samples.

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APA: Copy

ESFANDIARI, H., HOSSEINI, S.R., ASHRAFIZADEH, F., & KERMANPOUR, A.. (2015). COMPARISON AND CHARACTERIZATION OF THE SURFACE STRUCTURAL OF FINE-AND ULTRAFINE-GRAINED AISI 304L AUSTENITIC STAINLESS STEELS AFTER PLASMA NITRIDING. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, 11(24), 73-83. SID. https://sid.ir/paper/121031/en

Vancouver: Copy

ESFANDIARI H., HOSSEINI S.R., ASHRAFIZADEH F., KERMANPOUR A.. COMPARISON AND CHARACTERIZATION OF THE SURFACE STRUCTURAL OF FINE-AND ULTRAFINE-GRAINED AISI 304L AUSTENITIC STAINLESS STEELS AFTER PLASMA NITRIDING. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING[Internet]. 2015;11(24):73-83. Available from: https://sid.ir/paper/121031/en

IEEE: Copy

H. ESFANDIARI, S.R. HOSSEINI, F. ASHRAFIZADEH, and A. KERMANPOUR, “COMPARISON AND CHARACTERIZATION OF THE SURFACE STRUCTURAL OF FINE-AND ULTRAFINE-GRAINED AISI 304L AUSTENITIC STAINLESS STEELS AFTER PLASMA NITRIDING,” IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, vol. 11, no. 24, pp. 73–83, 2015, [Online]. Available: https://sid.ir/paper/121031/en

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