Mechanisms of laser non-uniform shock peening on the mechanical properties of SUS 304 stainless steel weld joints
The technique of Laser Non-Uniform Shock Peening (LNUSP) is proposed based on the residual stress distribution in welded joints and the shock wave peak pressure of SUS 304 stainless steel. The study investigated the effects of LNUSP on the mechanical properties of laser beam oscillation welded (LWW)...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424023962 |
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| author | Yongqi Sheng Aixin Feng Yirui Ke Yifeng Chen Jifeng Pan Xiangguang Cao |
| author_facet | Yongqi Sheng Aixin Feng Yirui Ke Yifeng Chen Jifeng Pan Xiangguang Cao |
| author_sort | Yongqi Sheng |
| collection | DOAJ |
| description | The technique of Laser Non-Uniform Shock Peening (LNUSP) is proposed based on the residual stress distribution in welded joints and the shock wave peak pressure of SUS 304 stainless steel. The study investigated the effects of LNUSP on the mechanical properties of laser beam oscillation welded (LWW) joints of SUS 304 stainless steel. The results indicate that LNUSP induced residual compressive stress with an affected layer depth exceeding 0.9 mm, leading to a more uniform residual stress distribution. LNUSP also induced martensitic phase transformation, altered the grain structure orientation, formed parallel dislocation arrays that refined the grains, increased dislocation density leading to dislocation tangles, and induced mechanical twins of 20–70 nm. Furthermore, LNUSP significantly enhanced microhardness and promoted a more uniform hardness distribution, favoring a better balance between strength and ductility. LNUSP notably increased the yield strength (YS) and ultimate tensile strength (UTS) by 49.4% and 5.1%, respectively, compared to the original samples. The LNUSP-treated samples demonstrated superior strength and plasticity, attributed to the uniformity of internal plastic deformation. |
| format | Article |
| id | doaj-art-d80ce2eded09419dacba94fdb054bf99 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-d80ce2eded09419dacba94fdb054bf992025-08-20T02:38:59ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01334625463610.1016/j.jmrt.2024.10.126Mechanisms of laser non-uniform shock peening on the mechanical properties of SUS 304 stainless steel weld jointsYongqi Sheng0Aixin Feng1Yirui Ke2Yifeng Chen3Jifeng Pan4Xiangguang Cao5College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, PR China; Rui'an Graduate College, Wenzhou University, Ruian, Wenzhou, 325200, PR China; Zhejiang Provincial Key Laboratory of Laser Processing Robots/Machinery Industry Key Laboratory of Laser Processing and Testing, Wenzhou 325035, PR ChinaCollege of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, PR China; Rui'an Graduate College, Wenzhou University, Ruian, Wenzhou, 325200, PR China; Zhejiang Provincial Key Laboratory of Laser Processing Robots/Machinery Industry Key Laboratory of Laser Processing and Testing, Wenzhou 325035, PR China; Corresponding author. College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, PR China.College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, PR China; Rui'an Graduate College, Wenzhou University, Ruian, Wenzhou, 325200, PR China; Zhejiang Provincial Key Laboratory of Laser Processing Robots/Machinery Industry Key Laboratory of Laser Processing and Testing, Wenzhou 325035, PR ChinaCollege of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, PR China; Rui'an Graduate College, Wenzhou University, Ruian, Wenzhou, 325200, PR China; Zhejiang Provincial Key Laboratory of Laser Processing Robots/Machinery Industry Key Laboratory of Laser Processing and Testing, Wenzhou 325035, PR ChinaCollege of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, PR China; Rui'an Graduate College, Wenzhou University, Ruian, Wenzhou, 325200, PR China; Zhejiang Provincial Key Laboratory of Laser Processing Robots/Machinery Industry Key Laboratory of Laser Processing and Testing, Wenzhou 325035, PR ChinaWenzhou Zhisen Industrial Co., Ltd, Ruian, Wenzhou 325200, PR ChinaThe technique of Laser Non-Uniform Shock Peening (LNUSP) is proposed based on the residual stress distribution in welded joints and the shock wave peak pressure of SUS 304 stainless steel. The study investigated the effects of LNUSP on the mechanical properties of laser beam oscillation welded (LWW) joints of SUS 304 stainless steel. The results indicate that LNUSP induced residual compressive stress with an affected layer depth exceeding 0.9 mm, leading to a more uniform residual stress distribution. LNUSP also induced martensitic phase transformation, altered the grain structure orientation, formed parallel dislocation arrays that refined the grains, increased dislocation density leading to dislocation tangles, and induced mechanical twins of 20–70 nm. Furthermore, LNUSP significantly enhanced microhardness and promoted a more uniform hardness distribution, favoring a better balance between strength and ductility. LNUSP notably increased the yield strength (YS) and ultimate tensile strength (UTS) by 49.4% and 5.1%, respectively, compared to the original samples. The LNUSP-treated samples demonstrated superior strength and plasticity, attributed to the uniformity of internal plastic deformation.http://www.sciencedirect.com/science/article/pii/S2238785424023962SUS 304Laser non-uniform shock peening (LNUSP)Yield strengthHardnessGrain refinement |
| spellingShingle | Yongqi Sheng Aixin Feng Yirui Ke Yifeng Chen Jifeng Pan Xiangguang Cao Mechanisms of laser non-uniform shock peening on the mechanical properties of SUS 304 stainless steel weld joints Journal of Materials Research and Technology SUS 304 Laser non-uniform shock peening (LNUSP) Yield strength Hardness Grain refinement |
| title | Mechanisms of laser non-uniform shock peening on the mechanical properties of SUS 304 stainless steel weld joints |
| title_full | Mechanisms of laser non-uniform shock peening on the mechanical properties of SUS 304 stainless steel weld joints |
| title_fullStr | Mechanisms of laser non-uniform shock peening on the mechanical properties of SUS 304 stainless steel weld joints |
| title_full_unstemmed | Mechanisms of laser non-uniform shock peening on the mechanical properties of SUS 304 stainless steel weld joints |
| title_short | Mechanisms of laser non-uniform shock peening on the mechanical properties of SUS 304 stainless steel weld joints |
| title_sort | mechanisms of laser non uniform shock peening on the mechanical properties of sus 304 stainless steel weld joints |
| topic | SUS 304 Laser non-uniform shock peening (LNUSP) Yield strength Hardness Grain refinement |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424023962 |
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