Evaluation of Nd: YAG Laser Welding Efficiencies for 304L Stainless Steel

Tadamalle, A.P.; Reddy, Y. P.; Ramjee, E.; Reddy, V. Venkateswara

doi:10.1016/j.mspro.2014.07.160

Cited by 18 publications

(9 citation statements)

References 8 publications

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“…for the laser-GMA welding and was calculated by using Equation 5. The energy transfer efficiencies for laser and GMA welding of stainless steel were set at 0.72 (η L ) [27], and 0.8 (η G ) [28], respectively. P is the laser power, U and I are the voltage and current of the GMAW, and v is the scanning speed.…”

Section: Tablementioning

confidence: 99%

Laser-based welding of 17-4 PH martensitic stainless steel in a tubular butt joint configuration with a built-in backing bar

Atabaki

Liu

et al. 2016

Optics & Laser Technology

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Laser-based welding of thick 17-4 precipitation hardening (PH) martensitic stainless steel (SS) plates in a tubular butt joint configuration with a builtin backing bar is very challenging because the porosity and cracks are easily generated in the welds. The backing bar blocked the keyhole opening at the bottom surface through which the entrapped gas could escape, and the keyhole was unstable and collapsed overtime in a deep partially penetrated welding conditions resulting in the formation of pores easily. Moreover, the fast cooling rate prompted the ferrite transform to austenite which induced cracking. Two-pass welding procedure was developed to join 17-4 PH martensitic SS. The laser welding assisted by a filler wire, as the first pass, was used to weld the groove shoulder. The added filler wire could absorb a part of the laser beam energy; resulting in the decreased weld depth-to-width ratio and relieved intensive restraint at the weld root. A hybrid laser-arc welding or a gas metal arc welding (GMAW) was used to fill the groove as the second pass. Nitrogen was introduced to stabilize the keyhole and mitigate the porosity. Preheating was used to decrease the cooling rate and mitigate the cracking during laser-based welding of 17-4 PH martensitic SS plates.

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Section: Tablementioning

confidence: 99%

Laser-based welding of 17-4 PH martensitic stainless steel in a tubular butt joint configuration with a built-in backing bar

Atabaki

Liu

et al. 2016

Optics & Laser Technology

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“…Therefore, it is crucial to choose the appropriate welding parameters because the parameters directly affect the weld quality. And, the main Nd:YAG laser welding parameters are average power rate, pulse duration time, pulse frequency and focal spot diameter (Tadamalle et al 2014) (Pereira et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Nd:YAG Lazer Kaynağı ile Birleştirilen Farklı Türdeki DP600-DP1000 Çeliklerinde Mekanik ve Mikroyapı Özellikleri

Tunçel

Aydın

Çetin

2020

Afyon Kocatepe University Journal of Sciences and Engineering

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In this study, the DP600 and DP1000 steel sheets were joined with the pulsed Nd:YAG (Neodymium-doped Yttrium Aluminum Garnet (Y3Al5O12)) laser welding and, mechanical and microstructure properties of the dissimilar welds were experimentally investigated. As known, there is a demand in modern automotive industry for performing dissimilar weld of DP steel sheets. In the laser welding operation, the selection of welding parameters affects the final properties of welds substantially. So, the main aim of this study was determining the influence of pulse frequency on the mechanical properties of pulsed Nd:YAG laser welded DP600-DP1000 steel sheet joints. For this purpose, dissimilar (DP600-DP1000) steel sheets were doublesided welded with the butt joint. To analyze the welding performance, microstructural studies, tensile tests and microhardness measurements were carried out. The weld cross-sections of the joints revealed three main distinct macrostructural zones: Base metal and heat affected zone of both steels, and fusion zone. Moreover, a transition zone was observed between the base metal and heat affected zone on the DP1000 sides. Higher pulse frequency led to deeper penetration and larger fusion zone and heat affected zone. The laser welded joints without filler material had macro porosities in the fusion zones. The tensile strength of the joints significantly increased with increasing pulse frequency. The tensile strengths obtained in this study may be quite satisfactory for automotive industrial applications. Fusion zone had the highest microhardness values. However, the lower microhardness values than base material were measured in the transition zone on DP1000 side.

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“…They concluded that organizations should be moved toward the producing products with appropriate quality so that it becomes able to satisfy demands of customers. In addition, Benner and Tushman [91][92][93][94][95][96] demonstrated that TQM cannot be considered as an obstacle for emerging the innovation [91,92]. However, they more focused on applicable innovations leading to new, high quality product than innovations leading to fundamental researches [93,94].…”

Section: Introductionmentioning

confidence: 99%

“…Here, this question may be raised that how TQM can converge to technology management and research and development management? Literature review shows that discussions about technology, research and development management have been specifically considered in TQM literature [90][91][92][93][94][95][96][97][98][99][100]. The techniques and tools such as statistical process control (SPC), heptagonal tools of quality control, quality function deployment (QFD) and failure mode and effect analysis (FMEA) can be mentioned among those discussions [95].…”

Section: Introductionmentioning

confidence: 99%

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Investigating the Role of Integrity between Total Quality Management and Technology Management in Determining the Quality and Innovation Functions: A Study About Productive Companies in Kerman Province, South-East Iran

Moshrefi¹

2015

IJSER

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Abstract-The current paper is prepared based on a descriptive study and through it, the integrity between total quality management (TQM) and technology, research and development (TIM), along the prediction of organization's functions in quality and innovation field, are examined. This investigation shows the relationship between TQM and TIM with focusing on two important issues: first, the integrity between TQM and TIM is focused via studying the gap between these two important sections, which are separated in organizations and have different duty descriptions. Second, the impacts of integrity between TQM and TIM on function indices of quality and innovation, which are the first and most important resources in taking competitive advantages for organizations, are examined. The required information for this study is collected from 148 managers of productive companies with more than 500 personnel, in Kerman province, and the constitutive equations model technique is used to analyze the collected information. The results show that: TQM has strong predictive power for qualitative functions of organization but it has not any clear and significant relationship with innovation functions. TIM also has predictive power for qualitative functions of organization but its intensity is lower than TQM. However, TIM has a stronger relationship for predicting the innovation functions of organization than TQM. Finally, TQM and TIM have a correlation with each other. The most important result obtained from the current study is that technology, research and development management is a suitable resource for applying along with and in accordance with TQM which the result of this cooperation is improvement of qualitative functions, and with higher importance, is support of innovation functions in organizations.

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Evaluation of Nd: YAG Laser Welding Efficiencies for 304L Stainless Steel

Cited by 18 publications

References 8 publications

Laser-based welding of 17-4 PH martensitic stainless steel in a tubular butt joint configuration with a built-in backing bar

Laser-based welding of 17-4 PH martensitic stainless steel in a tubular butt joint configuration with a built-in backing bar

Nd:YAG Lazer Kaynağı ile Birleştirilen Farklı Türdeki DP600-DP1000 Çeliklerinde Mekanik ve Mikroyapı Özellikleri

Investigating the Role of Integrity between Total Quality Management and Technology Management in Determining the Quality and Innovation Functions: A Study About Productive Companies in Kerman Province, South-East Iran

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