FEM analysis of thermal and residual stress profile in selective laser melting of 316L stainless steel

Waqar, Saad; Guo, Kai; Sun, Jie

doi:10.1016/j.jmapro.2021.03.040

Cited by 74 publications

(28 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 2 depicts the thermal physical properties of 316L stainless steel (SS) for powder and solid regions at various temperatures (Waqar et al , 2021a). Given the time–temperature distribution of all nodes, thermal variables were measured.…”

Section: D Finite Element Methods Model For Selective Laser Meltingmentioning

confidence: 99%

“…Fergani et al (2017) reported significant residual stresses in the build direction. Besides above, other studies investigated the influences of laser parameters, processing conditions, and post-heat-treatments on the changing thermal stresses of SLM components (De Baere et al , 2021; Chen et al , 2019b; Mertens et al , 2018; Savalani and Pizarro, 2016; Waqar et al , 2021a).…”

Section: Introductionmentioning

confidence: 99%

“…Although, extensive research on SLM-induced residual stresses has undoubtedly been conducted in the past few years, these studies focused primarily on certain traditional SLM processing factors, such as a combination of laser power, scanning speed and hatching, or approaches integrating scanning patterns and scan track length (Roberts et al , 2009; Singla et al , 2021; Waqar et al , 2021a). However, research based on residual stress with complex SLM made topologies has not been thoroughly studied.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evolution of temperature and residual stress behavior in selective laser melting of 316L stainless steel across a cooling channel

Khan

Waqar

Koç

2022

RPJ

Self Cite

View full text Add to dashboard Cite

Purpose The current investigation aims at observing the influence of the cooling channel on the thermal and residual stress behavior of the selective laser melting (SLM)316L uni-layer thermo-mechanical model. Design/methodology/approach On a thermo-mechanical model with a cooling channel, the effect of scanning direction, parallel and perpendicular and scan spacing was simulated. The effect of underlying solid and powder bases was evaluated on residual stress profile and thermal variables at various locations. Findings The high heat dissipation of solid base due to high cooling rates and steep thermal gradients can reciprocate with smaller melt pool temperature and melt pool size. Given the same scan spacing, residual stresses were found lower when laser scanning was perpendicular to the cooling channel. Moreover, large scan spacing was found to increase residual stresses. Originality/value Cooling channels are increasingly being used in additive manufacturing; however, their effect on the residual stress behavior of the SLM component is not extensively studied. This research can serve as a foundation for further inquiries into the impact of base material design such as cooling channels on manufactured components using SLM.

show abstract

Section: D Finite Element Methods Model For Selective Laser Meltingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evolution of temperature and residual stress behavior in selective laser melting of 316L stainless steel across a cooling channel

Khan

Waqar

Koç

2022

RPJ

Self Cite

View full text Add to dashboard Cite

show abstract

“…That model may be built directly in the program, or it can be entered into the software using laser scanning equipment, which will take an actual item and bring it into the system. The program generates the Standard Tessellation Language (STL) file after the design is completed (Waqar et al , 2021a). STL is the most widely used Additive Manufacturing file format.…”

Section: Introductionmentioning

confidence: 99%

A physical investigation of dimensional and mechanical characteristics of 3D printed nut and bolt for industrial applications

Chand

Sharma

Trehan

et al. 2022

RPJ

View full text Add to dashboard Cite

Purpose A nut bolt joint is a primary device that connects mechanical components. The vibrations cause bolted joints to self-loosen. Created by motors and engines, leading to machine failure, and there may be severe safety issues. All the safety issues and self-loosen are directly and indirectly the functions of the accuracy and precision of the fabricated nut and bolt. Recent advancements in three-dimensional (3D) printing technologies now allow for the production of intricate components. These may be used technologies such as 3D printed bolts to create fasteners. This paper aims to investigate dimensional precision, surface properties, mechanical properties and scanning electron microscope (SEM) of the component fabricated using a multi-jet 3D printer. Design/methodology/approach Multi-jet-based 3D printed nut-bolt is evaluated in this paper. More specifically, liquid polymer-based nut-bolt is fabricated in sections 1, 2 and 3 of the base plate. Five nuts and bolts are fabricated in these three sections. Findings Dimensional inquiry (bolt dimension, general dimensions’ density and surface roughness) and mechanical testing (shear strength of nut and bolt) were carried out throughout the study. According to the ISO 2768 requirements for the General Tolerances Grade, the nut and bolt’s dimensional examination (variation in bolt dimension, general dimensions) is within the tolerance grades. As a result, the multi-jet 3D printing (MJP)-based 3D printer described above may be used for commercial production. In terms of mechanical qualities, when the component placement moves from Sections 1 to 3, the density of the manufactured part decreases by 0.292% (percent) and the shear strength of the nut and bolt decreases by 30%. According to the SEM examination, the density of the River markings, sharp edges, holes and sharp edges increased from Sections 1 to 3, which supports the findings mentioned above. Originality/value Hence, this work enlightens the aspects causing time lag during the 3D printing in MJP. It causes variation in the dimensional deviation, surface properties and mechanical properties of the fabricated part, which needs to be explored.

show abstract

“…Additive manufacturing methods are opposite of conventional machining methods. In machining, the chips are removed from the base material and a product of the desired shape and size is obtained, while in additive manufacturing, the parts are combined in layers (Ramoni et al , 2021; Waqar et al , 2021a). Therefore, the use of materials in additive manufacturing is less than traditional machining (Rautio et al , 2020; Zhang et al , 2021).…”

Section: Introductionmentioning

confidence: 99%

Erosion characteristics on surface texture of additively manufactured AlSi10Mg alloy in SiO₂ quartz added slurry environment

Demirsöz

Korkmaz

Gupta

et al. 2021

RPJ

View full text Add to dashboard Cite

Purpose The main purpose of this work is to explore the erosion wear characteristics of additively manufactured aluminium alloy. Additive manufacturing (AM), also known as three-dimensional (3D) manufacturing, is the process of manufacturing a part designed in a computer environment using different types of materials such as plastic, ceramic, metal or composite. Similar to other materials, aluminum alloys are also exposed to various wear types during operation. Production efficiency needs to be aware of its reactions to wearing mechanisms. Design/methodology/approach In this study, quartz sands (SiO2) assisted with oxide ceramics were used in the slurry erosion test setup and its abrasiveness on the AlSi10Mg aluminum alloy material produced by the 3D printer as selective laser melting (SLM) technology was investigated. Quartz was sieved with an average particle size of 302.5 µm, and a slurry environment containing 5, 10 and 15% quartz by weight was prepared. The experiments were carried out at the velocity of 1.88 (250 rpm), 3.76 (500 rpm) and 5.64 m/s (750 rpm) and the impact angles 15, 45 and 75°. Findings With these experimental studies, it has been determined that the abrasiveness of quartz sand prepared in certain particle sizes is directly related to the particle concentration and particle speed, and that the wear increases with the increase of the concentration and rotational speed. Also, the variation of weight loss and surface roughness of the alloy was investigated after different wear conditions. Surface roughness values at 750 rpm speed, 10% concentration and 75° impingement angle are 0.32 and 0.38 µm for 0 and 90° samples, respectively, with a difference of approximately 18%. Moreover, concerning a sample produced at 0°, the weight loss at 250 rpm at 10% concentration and 45° particle impact angle is 32.8 mg, while the weight loss at 500 rpm 44.4 mg, and weight loss at 750 rpm is 104 mg. Besides, the morphological structures of eroded surfaces were examined using the scanning electron microscope to understand the wear mechanisms. Originality/value The researchers verified that this specific coating condition increases the slurry wear resistance of the mentioned steel. There are many studies about slurry wear tests; however, there is no study in the literature about the quartz sand (SiO2) assisted slurry-erosive wear of AlSi10Mg alloy produced with AM by using SLM technology. This study is needed to fill this gap in the literature and to examine the erosive wear capability of this current material in different environments. The novelty of the study is the use of SiO2 quartz sands assisted by oxide ceramics in different concentrations for the slurry erosion test setup and the investigations on erosive wear resistance of AlSi10Mg alloy manufactured by AM.

show abstract

FEM analysis of thermal and residual stress profile in selective laser melting of 316L stainless steel

Cited by 74 publications

References 40 publications

Evolution of temperature and residual stress behavior in selective laser melting of 316L stainless steel across a cooling channel

Evolution of temperature and residual stress behavior in selective laser melting of 316L stainless steel across a cooling channel

A physical investigation of dimensional and mechanical characteristics of 3D printed nut and bolt for industrial applications

Erosion characteristics on surface texture of additively manufactured AlSi10Mg alloy in SiO₂ quartz added slurry environment

Contact Info

Product

Resources

About

FEM analysis of thermal and residual stress profile in selective laser melting of 316L stainless steel

Cited by 74 publications

References 40 publications

Evolution of temperature and residual stress behavior in selective laser melting of 316L stainless steel across a cooling channel

Evolution of temperature and residual stress behavior in selective laser melting of 316L stainless steel across a cooling channel

A physical investigation of dimensional and mechanical characteristics of 3D printed nut and bolt for industrial applications

Erosion characteristics on surface texture of additively manufactured AlSi10Mg alloy in SiO2 quartz added slurry environment

Contact Info

Product

Resources

About

Erosion characteristics on surface texture of additively manufactured AlSi10Mg alloy in SiO₂ quartz added slurry environment