scholarly journals Study and modeling of melt pool evolution in selective laser melting process of SS316L

2018 ◽  
Vol 8 (03) ◽  
pp. 1178-1183 ◽  
Author(s):  
J. L. Tan ◽  
C. Tang ◽  
C. H. Wong
Keyword(s):  
Selective Laser Melting ◽  
Melting Process ◽  
Laser Melting ◽  
Selective Laser Melting Process ◽  
Melt Pool ◽  
Image Position

Abstract

Numerical Investigation of Selective Laser Melting Process for 904L Stainless Steel

2012 ◽  
Author(s):  
Miranda Fateri ◽  
Andreas Gebhardt ◽  
Maziar Khosravi
Keyword(s):  
Heat Flux ◽  
Stainless Steel ◽  
Selective Laser Melting ◽  
Melting Process ◽  
Full Density ◽  
Laser Melting ◽  
Scanning Velocity ◽  
Selective Laser Melting Process ◽  
Fine Mesh ◽  
Melt Pool

Selective Laser Melting process (SLM) is an important manufacturing method for producing complex geometries which allows for creation of full density parts with similar properties as the bulk material without extensive post processing. In SLM process, laser power, beam focus diameter, and scanning velocity must be precisely set based on the material properties in order to produce dense parts. In this study, Finite Element Analysis (FEA) method is employed in order to simulate and analyze a single layer of 904L Stainless Steel. A three-dimensional transient thermal model of the SLM process based on phase change enthalpy, irradiation scattering, and heat conductivity of powder is developed. The laser beam is modeled as a moving heat flux on the surface of the layer using a fine mesh which allows for a variation of the shape and distribution of the beam. In this manner, various Gaussian distributions are investigated and compared against single and multi-element heat flux sources. The melt pool and temperature distribution in the part are numerically investigated in order to determine the effects of varying laser intensity, scanning velocity as well as preheating temperature. The results of the simulation are verified by comparing the melt pool width as a function of power and velocity against the experimentally obtained results. Lastly, 3D objects are fabricated with a SLM 50 Desktop machine using the acquired optimized process parameters.

Characteristic length of the solidified melt pool in selective laser melting process

2017 ◽  
Vol 23 (2) ◽  
pp. 370-381 ◽  
Author(s):  
Il Hyuk Ahn ◽  
Seung Ki Moon ◽  
Jihong Hwang ◽  
Guijun Bi
Keyword(s):  
Selective Laser Melting ◽  
Characteristic Length ◽  
Melting Process ◽  
Evaluation Methods ◽  
Laser Melting ◽  
Content Type ◽  
Selective Laser Melting Process ◽  
Melt Pool ◽  
Scan Modes ◽  
Hatch Spacing

Purpose This paper aims to propose methods to evaluate the characteristic length of the melt pool for accurate fabrication and to identify the optimal process parameters in the selective laser melting process. Design/methodology/approach Specimens with the types of the scans by controlling the degree of the overlap with hatch spacing are fabricated. The scan modes are classified by statistically analyzing the results of hardness tests. According to the classification of the scans, the evaluation methods are proposed based on the observation of the shape of the solidified melt pool. Findings The control of the hatch spacing can reproduce all modes of the scan conditions, and hardness can be used to classify the scan modes. Originality/value The proposed evaluation methods are based on the analysis of the experimental observation so that they can be easily used for the real evaluation.

Fabrication and mechanical properties of Al–Si-based alloys by selective laser melting process

2021 ◽  
pp. 1-8
Author(s):  
Yeong Seong Eom ◽  
Kyung Tae Kim ◽  
Dong Won Kim ◽  
Soo ho Jung ◽  
Jung Woo Nam ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Selective Laser Melting ◽  
Melting Process ◽  
Laser Melting ◽  
Selective Laser Melting Process
Sign in / Sign up

Export Citation Format

Share Document