INVESTIGATIONS OF THE MICROSTRUCTURE AND FRACTURE SURFACE OF THE PULSED ND: YAG LASER EELDING OF THE 304 STAINLESS STEEL

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GAREHDAGHI A.; AKBARI MOUSAVI S.A.A.

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Journal: Year:2009 | Volume:43 | Issue:2 (120) Page(s): 205-216

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Title

INVESTIGATIONS OF THE MICROSTRUCTURE AND FRACTURE SURFACE OF THE PULSED ND: YAG LASER EELDING OF THE 304 STAINLESS STEEL

Author(s)

GAREHDAGHI A. | AKBARI MOUSAVI S.A.A. | Issue Writer Certificate

Keywords

AISI 304 STAINLESS STEELQ3

ND: YAG PULSED LASERQ3

CR EQUIVALENTQ3

NI EQUIVALENTQ3

FERRITIC AND AUSTENITIC SOLIDIFICATIONSQ3

DUCTILE FRACTUREQ3

FRACTURE SURFACEQ3

Abstract

The present article considers the Nd:YAG pulsed laser welding of 304 stainless steels with two different compositions. The effects of various laser operational parameters and cooling rates on the weld microstructures were considered. The results show that ferritic solidification is produced in the stainless steel with the Creq/Nieq ratio of 1.7, and austenitic solidification is produced in the stainless steel with the Creq/Nieq ratio of 1.61. Moreover, the study shows that by using a high laser power, at high cooling rate, more ferrite is produced in the stainless steel welds. For the 1.7 Creq/Nieq ratio of stainless steel, the amount of ferrite is increased by using high laser power. In addition, high power laser produced more ferrite in the weld interface of 1.6 Creq/Nieq ratio of stainless steel. Samples were also undergone, proof and burst tests and the FRACTURE SURFACEs were considered. The fractographic examinations show that the mechanism of the fracture was DUCTILE FRACTURE, and the defects such as porosity, low weld depth may help in producing the fracture of the sample.

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APA: Copy

GAREHDAGHI, A., & AKBARI MOUSAVI, S.A.A.. (2009). INVESTIGATIONS OF THE MICROSTRUCTURE AND FRACTURE SURFACE OF THE PULSED ND: YAG LASER EELDING OF THE 304 STAINLESS STEEL. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), 43(2 (120)), 205-216. SID. https://sid.ir/paper/14397/en

Vancouver: Copy

GAREHDAGHI A., AKBARI MOUSAVI S.A.A.. INVESTIGATIONS OF THE MICROSTRUCTURE AND FRACTURE SURFACE OF THE PULSED ND: YAG LASER EELDING OF THE 304 STAINLESS STEEL. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN)[Internet]. 2009;43(2 (120)):205-216. Available from: https://sid.ir/paper/14397/en

IEEE: Copy

A. GAREHDAGHI, and S.A.A. AKBARI MOUSAVI, “INVESTIGATIONS OF THE MICROSTRUCTURE AND FRACTURE SURFACE OF THE PULSED ND: YAG LASER EELDING OF THE 304 STAINLESS STEEL,” JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), vol. 43, no. 2 (120), pp. 205–216, 2009, [Online]. Available: https://sid.ir/paper/14397/en

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