Selective Laser Melting of 3D Structures Produced from Heat-Resistant Cobalt Alloys

2015 ◽  
Vol 834 ◽  
pp. 71-76
Author(s):  
Tatiana Vasilievna Tarasova ◽  
Aleksey Petrovich Nazarov ◽  
Andrey Vladimirovich Gusarov
Keyword(s):  
Boundary Conditions ◽  
Selective Laser Melting ◽  
Complex Geometry ◽  
Cobalt Alloys ◽  
Cobalt Alloy ◽  
Laser Melting ◽  
3D Structures ◽  
3D Object ◽  
Heat Resistant ◽  
The Way

The technological possibilities of 3D object manufacturing with complex geometry from heat-resistant cobalt alloy by method of selective laser melting is considered in the work. The boundary conditions of the SLM and the way of its overcoming are demonstrated.

Defects of heat-resistant alloys synthesized by the method of selective laser melting

2017 ◽  
Vol 8 (1) ◽  
pp. 27-31 ◽  
Author(s):  
N. P. Alyoshin ◽  
V. V. Murashov ◽  
M. V. Grigoryev ◽  
A. G. Yevgenov ◽  
F. N. Karachevtsev ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Laser Melting ◽  
Heat Resistant

Selective laser melting of heat-resistant Ni-based alloy

2015 ◽  
pp. 32-35 ◽  
Author(s):  
V. Sh. Sufiiarov ◽  
◽  
A. A. Popovich ◽  
E. V. Borisov ◽  
I. A. Polozov ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Laser Melting ◽  
Heat Resistant

Processing of the Heat Resistant Bearing Steel M50NiL by Selective Laser Melting

2018 ◽  
Vol 73 (4) ◽  
pp. 187-201
Author(s):  
O. Beer ◽  
C. Merklein ◽  
D. Gerhard ◽  
O. Hentschel ◽  
M. Rasch ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Bearing Steel ◽  
Laser Melting ◽  
Heat Resistant

Analytical modeling of 3D temperature distribution in selective laser melting of Ti-6Al-4V considering part boundary conditions

2019 ◽  
Vol 44 ◽  
pp. 319-326 ◽  
Author(s):  
Jinqiang Ning ◽  
Elham Mirkoohi ◽  
Yuanzhe Dong ◽  
Daniel E. Sievers ◽  
Hamid Garmestani ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Boundary Conditions ◽  
Selective Laser Melting ◽  
Analytical Modeling ◽  
Laser Melting

Evolution of the Structure and Properties of High-Chromium Heat-Resistant VZh159 Alloy Prepared by Selective Laser Melting: Part I

2020 ◽  
Vol 11 (1) ◽  
pp. 7-16
Author(s):  
E. N. Kablov ◽  
A. G. Evgenov ◽  
I. S. Mazalov ◽  
S. V. Shurtakov ◽  
D. V. Zaitsev ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Structure And Properties ◽  
Laser Melting ◽  
High Chromium ◽  
Heat Resistant ◽  
Melting Part

scholarly journals Printability and Microstructure of Selective Laser Melting of WC/Co/Cr Powder

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2397 ◽  
Author(s):  
Sabina Luisa Campanelli ◽  
Nicola Contuzzi ◽  
Paolo Posa ◽  
Andrea Angelastro
Keyword(s):  
Selective Laser Melting ◽  
Complex Geometry ◽  
Melting Process ◽  
Powder Layer ◽  
Laser Melting ◽  
Heterogeneous Distribution ◽  
High Melting Temperature ◽  
Hardness Tests ◽  
Small Cracks ◽  
Melting And Solidification

The selective laser melting process is a growing technology for the manufacture of parts with very complex geometry. However, not all materials are suitable for this process, involving rapid localized melting and solidification. Tungsten has difficulties due to the high melting temperature. This study focuses on the possibility of processing a WC/Co/Cr composite powder using selective laser melting. Samples were fabricated and characterized in terms of density, defects, microstructure and hardness. Tests were conducted with hatch spacing of 120 μm and process speed of 40 mm/s. A constant laser power of 100 W and a powder layer thickness of 30 μm were used. A relative density of 97.53%, and therefore a low porosity, was obtained at an energy density of 12.5 J/mm2. Microscopic examination revealed the presence of small cracks and a very heterogeneous distribution of the grain size.

scholarly journals Microstructure evolution and mechanical properties of Hastelloy X alloy produced by Selective Laser Melting

2020 ◽  
Vol 39 (1) ◽  
pp. 124-135
Author(s):  
Sun Zhonggang ◽  
Ji Shuwei ◽  
Guo Yanhua ◽  
Lu Yichen ◽  
Chang Lili ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Microstructure Evolution ◽  
Laser Power ◽  
Complex Geometry ◽  
Lamellar Microstructure ◽  
Aging Treatment ◽  
Scanning Speed ◽  
Laser Melting ◽  
Columnar Crystal ◽  
Hastelloy X

AbstractSelective laser melting (SLM) is considered as an important additive manufacturing (AM) technology which can fabricate parts with complex geometry. However, it is difficult to predict the optimal SLM-parameters of metallic materials. In this study, orthogonal experiments were designed to study the influence of SLM-process parameters on the density and fabricated quality of Hastelloy X superalloy. Moreover, the relationship between microstructure evolution and performance of deposited microstructure was studied after heat treatment. The laser power, scanning speed and energy density have a significant effect on the density of the fabricated parts. The optimal parameters for determining Hastelloy X are 250 W laser power, 500 mm/s scanning speed, 100 μm hatch space, and 30 μmlayer thickness. The deposited microstructure is a lamellar microstructure in the horizontal direction and a columnar crystal in the longitudinal direction, and the microstructure is mainly martensite. After solid-solution and aging treatment, grain grows up. Martensite decomposes and the carbide M6C was precipitated during the aging process. The strength of the microstructure decreases slightly due to the growth of grain size.

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