scholarly journals Comparing the deformation mechanism in 316 L stainless steel fabricated by hybrid and additive manufacturing

2021 ◽  
Vol 288 ◽  
pp. 129369
Author(s):  
Rangasayee Kannan ◽  
Peeyush Nandwana ◽  
Thomas Feldhausen
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Deformation Mechanism ◽  
316 L Stainless Steel

Electropolishing of 316 L Stainless Steel Parts Elaborated By Additive Manufacturing: From Laboratory to Pilot Scale

2021 ◽  
Vol MA2021-02 (25) ◽  
pp. 802-802
Author(s):  
Estelle Drynski ◽  
Marie-Laure Doche ◽  
Jean-Yves Hihn ◽  
Florian Roy ◽  
Yann Dugenet ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Pilot Scale ◽  
316 L Stainless Steel

An Investigation Into the Challenges of Using Metal Additive Manufacturing for the Production of Patient-Specific Aneurysm Clips

2019 ◽  
Vol 13 (3) ◽  
Author(s):  
Brandon J. Walker ◽  
Benjamin L. Cox ◽  
Ulas Cikla ◽  
Gabriel Meric de Bellefon ◽  
Behzad Rankouhi ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Surgical Complication ◽  
Vascular Anatomy ◽  
Patient Specific ◽  
Biomedical Implants ◽  
Metal Additive Manufacturing ◽  
316 L Stainless Steel ◽  
Material Choice ◽  
Metal Additive

Cerebral aneurysm clips are biomedical implants applied by neurosurgeons to re-approximate arterial vessel walls and prevent catastrophic aneurysmal hemorrhages in patients. Current methods of aneurysm clip production are labor intensive and time-consuming, leading to high costs per implant and limited variability in clip morphology. Metal additive manufacturing is investigated as an alternative to traditional manufacturing methods that may enable production of patient-specific aneurysm clips to account for variations in individual vascular anatomy and possibly reduce surgical complication risks. Relevant challenges to metal additive manufacturing are investigated for biomedical implants, including material choice, design limitations, postprocessing, printed material properties, and combined production methods. Initial experiments with additive manufacturing of 316 L stainless steel aneurysm clips are carried out on a selective laser melting (SLM) system. The dimensions of the printed clips were found to be within 0.5% of the dimensions of the designed clips. Hardness and density of the printed clips (213 ± 7 HV1 and 7.9 g/cc, respectively) were very close to reported values for 316 L stainless steel, as expected. No ferrite and minimal porosity is observed in a cross section of a printed clip, with some anisotropy in the grain orientation. A clamping force of approximately 1 N is measured with a clip separation of 1.5 mm. Metal additive manufacturing shows promise for use in the creation of custom aneurysm clips, but some of the challenges discussed will need to be addressed before clinical use is possible.

Ferrite formation and its effect on deformation mechanism of wire arc additive manufactured 308 L stainless steel

2021 ◽  
Vol 550 ◽  
pp. 152933
Author(s):  
Yajing Li ◽  
Ying Luo ◽  
Jianghua Li ◽  
Danrong Song ◽  
Bin Xu ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Deformation Mechanism ◽  
Ferrite Formation

scholarly journals Parameters Optimization of Auxiliary Gas Process for Double-Wire SS316L Stainless Steel Arc Additive Manufacturing

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 190
Author(s):  
Wei Wu ◽  
Jiaxiang Xue ◽  
Wei Xu ◽  
Hongyan Lin ◽  
Heqing Tang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Process Parameters ◽  
Evaluation System ◽  
Gas Flow ◽  
Interactive Effect ◽  
Parameters Optimization ◽  
Heat Accumulation ◽  
Auxiliary Process ◽  
Strength And Stiffness

Serious heat accumulation limits the further efficiency and application in additive manufacturing (AM). This study accordingly proposed a double-wire SS316L stainless steel arc AM with a two-direction auxiliary gas process to research the effect of three parameters, such as auxiliary gas nozzle angle, auxiliary gas flow rate and nozzle-to-substrate distance on depositions, then based on the Box–Behnken Design response surface, a regression equation between three parameters and the total score were established to optimized parameters by an evaluation system. The results showed that samples with nozzle angle of 30° had poor morphology but good properties, and increasing gas flow or decreasing distance would enhance the airflow strength and stiffness, then strongly stir the molten pool and resist the interference. Then a diverse combination of auxiliary process parameters had different influences on the morphology and properties, and an interactive effect on the comprehensive score. Ultimately the optimal auxiliary gas process parameters were 17.4°, 25 L/min and 10.44 mm, which not only bettered the morphology, but refined the grains and improved the properties due to the stirring and cooling effect of the auxiliary gas, which provides a feasible way for quality and efficiency improvements in arc additive manufacturing.

Assessing the Co-Deformability of a Nickel-Based Superalloy-304L Stainless Steel Preform Manufactured through Laser Additive Manufacturing

2021 ◽  
Author(s):  
Dipti Samantaray ◽  
Bommakanti Aashranth ◽  
Neelakandapillai Lekshmanan Parthasarathi ◽  
Arun Kumar Rai ◽  
Marimuthu Arvinth Davinci ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
304L Stainless Steel ◽  
Laser Additive Manufacturing ◽  
Nickel Based Superalloy

scholarly journals Influence of Duty Ratio and Current Mode on Robot 316L Stainless Steel Arc Additive Manufacturing

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 508
Author(s):  
Ping Yao ◽  
Hongyan Lin ◽  
Wei Wu ◽  
Heqing Tang
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Heat Input ◽  
Low Frequency ◽  
Single Pulse ◽  
Pulse Mode ◽  
Double Pulse ◽  
Duty Ratio ◽  
Utilization Rate ◽  
Specimen Height

Wire and arc additive manufacturing (WAAM) is usually for fabricating components due to its low equipment cost, high material utilization rate and cladding efficiency. However, its applications are limited by the large heat input decided by process parameters. Here, four 50-layer stainless steel parts with double-pulse and single-pulse metal inert gas (MIG) welding modes were deposited, and the effect of different duty ratios and current modes on morphology, microstructure, and performance was analyzed. The results demonstrate that the low frequency of the double-pulse had the effect of stirring the molten pool; therefore, the double-pulse mode parts presented a bigger width and smaller height, finer microstructure and better properties than the single-pulse mode. Furthermore, increasing the duty ratio from 35% to 65% enlarged the heat input, which then decreased the specimen height, increased the width, and decreased the hardness and the tensile strength.

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