CORROSION EVALUATION OF LASER GAS NITRIDED TI-6A1-4V ALLOY

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SHOJA RAZAVI R.; SALEHI MAHDI; MONIR VAGHEFI S.M.; MOZAFARINIA R.

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Journal: IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING Year:2008 | Volume:- | Issue:5 Page(s): 23-34

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Title

CORROSION EVALUATION OF LASER GAS NITRIDED TI-6A1-4V ALLOY

Author(s)

SHOJA RAZAVI R. | SALEHI MAHDI | MONIR VAGHEFI S.M. | MOZAFARINIA R. | Issue Writer Certificate

Keywords

LASER GAS NITRIDING. TI-6A1-4VQ4

CORROSIONQ4

Abstract

Laser surface melting of Ti-6A1-4V alloy under a pure nitrogen environment of 30 lit/min gas flow rate was carried out with 200-600 mJ laser beams produced by a Nd- YAG pulsed laser. The Laser frequency and the pulse duration time were fixed at 10Hz and 200 mS, respectively. The microstructure and CORROSION behavior of the nitrided samples were examined, using scanning electron microscope, X-ray diffraction (XRD), and anodic polarization tests in 2M HCl solution. The microstructures consisted mainly of a thin continuous layer of titanium nitride followed by nearly perpendicular dendrites, and below this, a mixture of small dendrites and large needles with a random orientation. The dendritic structure was the TiN phase, and the needle phase and the phase of the matrix between the dendrites were nitrogen-enriched a’-Ti. An improvement in CORROSION behavior, associated with the presence of a good TiN coating, was observed. Also, the improved pitting CORROSION resistance was obtained due to the microstructural changes after laser treatment.

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APA: Copy

SHOJA RAZAVI, R., SALEHI, MAHDI, MONIR VAGHEFI, S.M., & MOZAFARINIA, R.. (2008). CORROSION EVALUATION OF LASER GAS NITRIDED TI-6A1-4V ALLOY. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, -(5), 23-34. SID. https://sid.ir/paper/121116/en

Vancouver: Copy

SHOJA RAZAVI R., SALEHI MAHDI, MONIR VAGHEFI S.M., MOZAFARINIA R.. CORROSION EVALUATION OF LASER GAS NITRIDED TI-6A1-4V ALLOY. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING[Internet]. 2008;-(5):23-34. Available from: https://sid.ir/paper/121116/en

IEEE: Copy

R. SHOJA RAZAVI, MAHDI SALEHI, S.M. MONIR VAGHEFI, and R. MOZAFARINIA, “CORROSION EVALUATION OF LASER GAS NITRIDED TI-6A1-4V ALLOY,” IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, vol. -, no. 5, pp. 23–34, 2008, [Online]. Available: https://sid.ir/paper/121116/en

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