Influence of Laser Scan Speed on Bronze Nickel Alloy Produced by Direct Metal Laser Sintering Technique

2018 ◽  
Vol 13 (2) ◽  
pp. 176-180
Author(s):  
R. Rajesh ◽  
Mithun V. Kulkarni
Keyword(s):  
Nickel Alloy ◽  
Laser Sintering ◽  
Direct Metal Laser Sintering ◽  
Scan Speed

Bending fatigue life characterisation of direct metal laser sintering nickel alloy 718

2015 ◽  
Vol 38 (9) ◽  
pp. 1105-1117 ◽  
Author(s):  
O. Scott-Emuakpor ◽  
J. Schwartz ◽  
T. George ◽  
C. Holycross ◽  
C. Cross ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Nickel Alloy ◽  
Laser Sintering ◽  
Alloy 718 ◽  
Direct Metal Laser Sintering ◽  
Bending Fatigue

Experimental Study of Direct Metal Laser Sintering: High Cycle Fatigue Life and Process Parameters

2020 ◽  
Author(s):  
Riley Seyffert ◽  
Sudhir Kaul
Keyword(s):  
Fatigue Life ◽  
Layer Thickness ◽  
Process Parameters ◽  
High Cycle Fatigue ◽  
Laser Sintering ◽  
Bending Test ◽  
Cycle Fatigue ◽  
Direct Metal Laser Sintering ◽  
Build Time ◽  
Scan Speed

Abstract Direct Metal Laser Sintering (DMLS) is a relatively new manufacturing process in additive manufacturing (AM) that fuses powdered metal by using a high-powered laser. Although this process allows manufacturing prototypes without requiring specific tooling, it is challenging to use this process for manufacturing high volume production parts since complex shapes can take a significant amount of build time. Furthermore, manufactured parts also need some amount of post-processing to remove the support material that may be required due to the layer-by-layer build process. This study investigates three process parameters that could be optimized to substantially reduce production time. These three parameters are as follows: build layer thickness, laser scan speed, and laser hatch distance. In order to evaluate the influence of these parameters, manufactured parts made of AISI 316L Stainless Steel are tested for fatigue life and static strength. A three-point bending test is used as per ASTM E466. While none of the three parameters is seen to significantly influence ultimate tensile strength, results indicate that build layer thickness is a significant process parameter that directly affects fatigue life. Furthermore, the interaction between build layer thickness and laser scan speed is found to be statistically significant for high cycle fatigue. However, laser scan speed and laser hatch distance are seen to be statistically insignificant for fatigue life. The initial results of this study indicate that process parameters of DMLS need to be selected judiciously in order to minimize build time while maintaining structural integrity.

Direct Metal Laser Sintering Strategies for Fabrication of Finer Resolution Cellular Structures

2020 ◽  
Author(s):  
Fatemeh Hejripour ◽  
Muhammad Abdus Salam ◽  
Gary L. Bowlin ◽  
Ebrahim Asadi
Keyword(s):  
Laser Sintering ◽  
Cellular Structures ◽  
Direct Metal Laser Sintering

Metallurgical and Mechanical Evaluation of 4340 Steel Produced by Direct Metal Laser Sintering

JOM ◽  
2015 ◽  
Vol 67 (3) ◽  
pp. 582-589 ◽  
Author(s):  
Elias Jelis ◽  
Matthew Clemente ◽  
Stacey Kerwien ◽  
Nuggehalli M. Ravindra ◽  
Michael R. Hespos
Keyword(s):  
Laser Sintering ◽  
Direct Metal Laser Sintering ◽  
4340 Steel
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