scholarly journals A Short Review on Thermal Treatments of Titanium & Nickel Based Alloys Processed by Selective Laser Melting

2021 ◽  
Author(s):  
Mehmet Erdi Korkmaz ◽  
Munish Kumar Gupta ◽  
Saad Waqar ◽  
Mustafa Kuntoğlu ◽  
Grzegorz M. Krolczyk ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Short Review ◽  
Thermal Treatments ◽  
Laser Melting ◽  
Titanium Nickel

scholarly journals Uncertainty assessment for measurement and simulation in selective laser melting: a case study of an aerospace part

ACTA IMEKO ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 96
Author(s):  
Giulio D'Emilia ◽  
Antoniomaria Di Ilio ◽  
Antonella Gaspari ◽  
Emanuela Natale ◽  
Antonios G. Stamopoulos
Keyword(s):  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
Manufacturing Process ◽  
Thermal Stresses ◽  
Hybrid Approach ◽  
Coordinate Measuring Machine ◽  
Thermal Treatments ◽  
Laser Melting ◽  
Measuring Machine ◽  
Simulation Results

<p class="Abstract"><span lang="EN-US">In this work, the additive manufacturing process selective laser melting is analysed with the aim of realising a complex piece for aerospace applications. In particular, the effect of the manufacturing process and of the following thermal treatments on the dimensions of the workpiece is evaluated. The study is based on a hybrid approach including a simulation of the whole manufacturing process by advanced software packages and the dimensional measurements of the realised pieces taken by a coordinate measuring machine (CMM). The integrated use of simulation and measurements is carried out with the aim of validating the simulation results and of identifying the operational limits of both approaches; this analysis is based on metrological evaluation of the results of both the simulation and the tests, taking into account the uncertainty of the data. In addition, the main causes of uncertainty for the simulation activity and the experimental data have been identified, and the effects of some of them have also been experimentally evaluated. Based on the experimental validation, the simulation seems to predict the absolute displacement of the supports of the piece in a satisfactory way, while it is unable, in the actual configuration, to assess the conformity of the surface to its very tight shape tolerances. Conformity assessment of the surface should be carried out by CMM measurement. Integrated use of simulation and experimental results is expected to strongly improve the accuracy of simulation results for the effective and accurate design and control of the additive manufacturing process, including dimensional control and thermal treatments to mitigate induced thermal stresses.</span></p>

Manufacturing of 18 Ni Marage 300 Steel Samples by Selective Laser Melting

2009 ◽  
Vol 83-86 ◽  
pp. 850-857 ◽  
Author(s):  
Sabina L. Campanelli ◽  
N. Contuzzi ◽  
Antonio D. Ludovico
Keyword(s):  
Mechanical Properties ◽  
Selective Laser Melting ◽  
Selective Laser Sintering ◽  
Main Process ◽  
Thermal Treatments ◽  
Laser Melting ◽  
Layer Manufacturing ◽  
Wide Range ◽  
Scan Speed

Selective Laser Sintering (SLS), has become one of the most popular technique in the layer manufacturing processes because of the ability to build complex geometries models with a wide range of materials. Recently, the interest in SLS is mainly focused into metals because of the possibility of producing models not only for the prototyping step but also as functional parts. Driven by the need to process nearly full dense objects, with mechanical properties comparable to those of bulk materials and by the desire to avoid long post processing cycles, Selective Laser Melting (SLM) has been developed. SLM represents an evolution of the SLS process: in the first one the complete melting of powder occurs rather than sintering or partial melting of the second one. SLM, is mainly suitable to produce tools and inserts with internal undercuts and channels for conformal cooling for injection molding. A careful control of the parameters which influence the melting and the amount of energy density involved in the process is necessary to get parts with optimized quality. The aim of this paper was to study the effect of the main process parameters (laser power, scan speed, scan spacing, hatch spacing, scanning strategy) and of thermal treatments on the quality of built parts in terms of hardness, density, microstructure, and mechanical properties. The 18 Ni Marage 300 steel, one of the most used materials in the die industry was investigated, using a Nd:YAG laser with a maximum power of 100W.

A short review on selective laser melting of H13 steel

2020 ◽  
Vol 108 (7-8) ◽  
pp. 2453-2466
Author(s):  
Jintao Wang ◽  
Shouping Liu ◽  
Yunpeng Fang ◽  
Zhongrui He
Keyword(s):  
Selective Laser Melting ◽  
Short Review ◽  
Laser Melting ◽  
H13 Steel

MANUFACTURING NOVEL HEAT TRANSFER DEVICES BY SELECTIVE LASER MELTING

Equipment ◽  
2006 ◽  
Author(s):  
S. Tsopanos ◽  
M. Wong ◽  
I. Owen ◽  
C. J. Sutcliffe
Keyword(s):  
Heat Transfer ◽  
Selective Laser Melting ◽  
Laser Melting

Properties of Ti-6Al-4V titanium alloys obtained by selective laser melting

2019 ◽  
pp. 46-57
Author(s):  
M.A. Kaplan ◽  
◽  
М.A. Smirnov ◽  
A.A. Kirsankin ◽  
M.A. Sevostyanov ◽  
...  
Keyword(s):  
Titanium Alloys ◽  
Selective Laser Melting ◽  
Laser Melting
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