Effects of Laser Shock Processing on Cavitation Erosion Resistance of Laser Weldments

Lei, 张雷 Zhang; Kaiyu, 罗开玉 Luo; Jinzhong, 鲁金忠 Lu; Yongkang, 张永康 Zhang; Aixin, 冯爱新 Feng

doi:10.3788/cjl201340.0203001

Cited by 2 publications

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“…As is known that tensile property is one important index of the material mechanical property, and LSP treatment can also improve the material tensile property after CE theoretically. Based on previous studies [ 2 , 3 , 4 ], the morphology of surface and cross section was changed during CE, and surface roughness was reduced, micro-hardness was increased, and residual stress was introduced; while the major index, tensile property, has not been involved. In order to study the CE resistance through LSP impacts systematically, effects of LSP on the tensile property of the samples subjected to CE will be specifically researched, and the tensile testing and fracture morphology are to be discussed next.…”

Section: Resultsmentioning

confidence: 99%

“…At present, ANSI 304 stainless steel (ANSI 304 SS) is widely used in parts of water pumps, valves, and blades, due to its characteristics and cheap cost. However, CE can deteriorate the ANSI 304 SS components, including the welding parts, which threatens the material performance [ 2 , 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

“…Then, the electrochemical corrosion resistance of ANSI 304 SS laser weldments was studied subjected to CE, with the studies on the surface roughness, residual stress and morphology of cross section before and after LSP treatment [ 3 ]. In addition, micro-hardness, X-ray diffraction (XRD) spectra, and surface morphologies of ANSI 304 SS laser weldments were subsequently researched based on the effects of LSP [ 2 , 4 ]. As a result, surface roughness was reduced, micro-hardness was increased, and residual stress was introduced both in the laser welding zone (LWZ) and heat-affected zone (HAZ) [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

“…LSP will be utilized to strengthen the CE resistance of ANSI 304 SS laser weldments in this study. On the other hand, it is found that the tensile property is also the major index of mechanical properties [ 12 , 13 , 14 ], while it is not studied during CE in the previous work [ 2 , 3 , 4 ]. Chen et al [ 15 ] found that the capability of the CE resistance could be represented by the tensile property.…”

Section: Introductionmentioning

confidence: 99%

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Tensile Property of ANSI 304 Stainless Steel Weldments Subjected to Cavitation Erosion Based on Treatment of Laser Shock Processing

et al. 2018

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Tensile property was one important index of mechanical properties of ANSI 304 stainless steel laser weldments subjected to cavitation erosion (CE). Laser shock processing (LSP) was utilized to strengthen the CE resistance, and the tensile property and fracture morphology were analyzed through three replicated experiment times. Results showed tensile process of treated weldments was composed of elastic deformation, plastic deformation, and fracture. The elastic limit, elastic modulus, elongation, area reduction, and ultimate tensile strength of tensile sample after CE were higher in view of LSP. In the fracture surface, the fiber zone, radiation zone and shear lip zone were generated, and those were more obvious through LSP. The number and size of pores in the fracture surface were smaller, and the fracture surface was smoother and more uniform. The dimples were elongated along the unified direction due to effects of LSP, and the elongated direction was in agreement with the crack propagation direction. Their distribution and shape were uniform with deeper depth. It could be reflected that the tensile property was improved by LSP and the CE resistance was also enhanced.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tensile Property of ANSI 304 Stainless Steel Weldments Subjected to Cavitation Erosion Based on Treatment of Laser Shock Processing

et al. 2018

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A Study of Picosecond-Laser Drilling Technique in Ceramics

Hu¹,

Wang²,

Lu³

et al. 2014

AMR

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In this paper, the technique of drilling process with picosecond(ps) laser is studiedinAl2O3 ceramics. The defocus method is used to drill the ceramic slice, which is able to improve thedrilling ratio of depth to diameter.It is found out that the best location ofthis ps-laser is about0.15mm under the lower surface of workpiece,demonstrating the difference from nanosecond(ns)-laser machinein the respective ofdefocusing.The impact of the power and the processing speed isinvestigated on the quality of the drilling. For ps-laser machine,a smaller and high qualitythrough-holeis achievable by increasing the power of laser and reducing the speed of process, withthe ratio of depth to diameter from 3.12 to 4.27.The ratio can be further increased upto 6.25,throughoptimization of these three parameters: defocusing amount, laser power and laser processing speed.

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Effects of Laser Shock Processing on Cavitation Erosion Resistance of Laser Weldments

Cited by 2 publications

References 0 publications

Tensile Property of ANSI 304 Stainless Steel Weldments Subjected to Cavitation Erosion Based on Treatment of Laser Shock Processing

Tensile Property of ANSI 304 Stainless Steel Weldments Subjected to Cavitation Erosion Based on Treatment of Laser Shock Processing

A Study of Picosecond-Laser Drilling Technique in Ceramics

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