The effect of fiber laser parameters on microhardness and microstructure of duplex stainless steel

Mohammed, Ghusoon Ridha; Ishak, M.; Aqida, S. N.; Abdulhadi, Hassan A.

doi:10.1051/matecconf/20179001024

Cited by 7 publications

(5 citation statements)

References 24 publications

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“…This effect of heat input can be justified by the cooling time [21,90]. When the welding process occurs with less heat input, the rapid cooling time leads to a scant measure of austenite and major chromium nitride precipitation.…”

Section: Pitting Corrosionmentioning

confidence: 99%

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mohammed

Ishak

Aqida

et al. 2017

Metals

102

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Abstract:The effects of input heat of different welding processes on the microstructure, corrosion, and mechanical characteristics of welded duplex stainless steel (DSS) are reviewed. Austenitic stainless steel (ASS) is welded using low-heat inputs. However, owing to differences in the physical metallurgy between ASS and DSS, low-heat inputs should be avoided for DSS. This review highlights the differences in solidification mode and transformation characteristics between ASS and DSS with regard to the heat input in welding processes. Specifically, many studies about the effects of heat energy input in welding process on the pitting corrosion, intergranular stress, stress-corrosion cracking, and mechanical properties of weldments of DSS are reviewed.

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Section: Pitting Corrosionmentioning

confidence: 99%

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mohammed

Ishak

Aqida

et al. 2017

Metals

102

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“…The weld microstructure of various materials is highly complex because of different cooling rates in the laser welding process [61]. On the other hand, steadiness in the microstructures at different weld locations can be determined.…”

Section: Metallography and Visual Examinationmentioning

confidence: 99%

Fiber Laser Welding of Dissimilar 2205/304 Stainless Steel Plates

Mohammed

Ishak

Ahmad

et al. 2017

Metals

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Abstract:In this study, an attempt on pulsed-fiber laser welding on an austenitic-duplex stainless steel butt joint configuration was investigated. The influence of various welding parameters, such as beam diameter, peak power, pulse repetition rate, and pulse width on the weld beads geometry was studied by checking the width and depth of the welds after each round of welding parameters combination. The weld bead dimensions and microstructural progression of the weld joints were observed microscopically. Finally, the full penetration specimens were subjected to tensile tests, which were coupled with the analysis of the fracture surfaces. From the results, combination of the selected weld parameters resulted in robust weldments with similar features to those of duplex and austenitic weld metals. The weld depth and width were found to increase proportionally to the laser power. Furthermore, the weld bead geometry was found to be positively affected by the pulse width. Microstructural studies revealed the presence of dendritic and fine grain structures within the weld zone at low peak power, while ferritic microstructures were found on the sides of the weld metal near the SS 304 and austenitic-ferritic microstructure beside the duplex 2205 boundary. Regarding the micro-hardness tests, there was an improvement when compared to the hardness of duplex and austenitic stainless steels base metals. Additionally, the tensile strength of the fiber laser welded joints was found to be higher when compared to the tensile strength of the base metals (duplex and austenitic) in all of the joints.

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“…It has been found that gas pressure has a noticeable effect on the hardness Vickers values as it helps in removing the heat quickly and cause a rapid cooling to the 316 steel alloy [25], also, the microhardness increased in the places of heat affected zone which has a rapid cooling [26]. Also, another study of the effect of laser power on the microhardness has been done during the laser deposition process, which has cleared that if laser beam power increased the microhardness values increase as well [27], another study confirmed that the laser beam power during the laser deposition process has made a big effect on the microhardness values [28].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Effect of Laser Cutting Parameters on Microhardness and Average Kerf Width of Ti-6Al-4V Alloy

Alsaadawy,

dewidar,

Said

et al. 2023

Journal of Contemporary Technology and Applied Engineering

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Titanium alloys, particularly Ti-6Al-4V alloy, are important materials due to their exceptional mechanical and chemical characteristics. They are employed in a wide range of high-strength and high-temperature applications, including ships, biomedical, and aerospace applications. Laser machines have recently been utilized to cut a variety of material types. Understanding how laser cutting settings affect cut surface quality is crucial. In this study, a 4 mm-thick sheet of Ti-6Al-4V alloy was cut. The cutting parameters were Laser power, cutting velocity, and assist gas pressure, while microhardness and average kerf width were the measured parameters. the main effective parameter for microhardness values is laser beam power followed by assist gas pressure and cutting velocity, while the main effective parameter for average kerf width is laser beam power followed by cutting velocity and assist gas pressure. The highest microhardness and average kerf width values of 332±10 HV and 909±16 μm, respectively, were observed at a laser power of 3 kW, a cutting speed of 1000 mm/min, and an auxiliary gas pressure of 10 bar. While the lowest microhardness and average kerf width values of 269±10 HV and 431.25±43.5 µm respectively, were observed at a laser power of 2 kW, a cutting speed of 1000 mm/min, and an auxiliary gas pressure of 6 bar.

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The effect of fiber laser parameters on microhardness and microstructure of duplex stainless steel

Cited by 7 publications

References 24 publications

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Fiber Laser Welding of Dissimilar 2205/304 Stainless Steel Plates

Investigation of Effect of Laser Cutting Parameters on Microhardness and Average Kerf Width of Ti-6Al-4V Alloy

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