scholarly journals Influence of post fabrication heat treatments on the fatigue behavior of Ti-6Al-4V produced by selective laser melting

2017 ◽  
Vol 7 ◽  
pp. 133-140 ◽  
Author(s):  
Gianni Nicoletto ◽  
Stefania Maisano ◽  
Michele Antolotti ◽  
Filippo Dall’Aglio
Keyword(s):  
Selective Laser Melting ◽  
Fatigue Behavior ◽  
Heat Treatments ◽  
Laser Melting

Influence of Heat Treatment on Microstructure and Mechanical Properties of Selective Laser Melted TiAl6V4 Alloy

2018 ◽  
Vol 284 ◽  
pp. 615-620 ◽  
Author(s):  
R.M. Baitimerov ◽  
P.A. Lykov ◽  
L.V. Radionova
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Selective Laser Melting ◽  
Room Temperature ◽  
Base Alloy ◽  
Tensile Tests ◽  
Heat Treatments ◽  
Laser Melting ◽  
Microstructure And Mechanical Properties ◽  
Treatment Procedures

TiAl6V4 titanium base alloy is widely used in aerospace and medical industries. Specimens for tensile tests from TiAl6V4 with porosity less than 0.5% was fabricated by selective laser melting (SLM). Specimens were treated using two heat treatment procedures, third batch of specimens was tested in as-fabricated statement after machining. Tensile tests were carried out at room temperature. Microstructure and mechanical properties of SLM fabricated TiAl6V4 after different heat treatments were investigated.

Mechanical Behaviour of Gas Nitrided Ti6Al4V Bars Produced by Selective Laser Melting

2016 ◽  
Vol 704 ◽  
pp. 225-234 ◽  
Author(s):  
Peter Franz ◽  
Aamir Mukhtar ◽  
Warwick Downing ◽  
Graeme Smith ◽  
Ben Jackson
Keyword(s):  
Heat Treatment ◽  
Selective Laser Melting ◽  
Nitrided Layer ◽  
Xrd Analysis ◽  
Compound Layer ◽  
Processing Parameters ◽  
Heat Treatments ◽  
Laser Melting ◽  
Gas Nitriding ◽  
Heat Treated

Gas atomized Ti-6Al-4V (Ti64) alloy powder was used to prepare distinct designed geometries with different properties by selective laser melting (SLM). Several heat treatments were investigated to find suitable processing parameters to strengthen (specially to harden) these parts for different applications. The results showed significant differences between tabulated results for heat treated billet Ti64 and SLM produced Ti64 parts, while certain mechanical properties of SLM Ti64 parts could be improved by different heat treatments using different processing parameters. Most heat treatments performed followed the trends of a reduction in tensile strength while improving ductility compared with untreated SLM Ti64 parts.Gas nitriding [GN] (diffusion-based thermo-chemical treatment) has been combined with a selected heat treatment for interstitial hardening. Heat treatment was performed below β-transus temperature using minimum flow of nitrogen gas with a controlled low pressure. The surface of the SLM produced Ti64 parts after gas nitriding showed TiN and Ti2N phases (“compound layer”, XRD analysis) and α (N) – Ti diffusion zones as well as high values of micro-hardness as compared to untreated SLM produced Ti64 parts. The microhardness profiles on cross section of the gas nitrided SLM produced samples gave information about the i) microhardness behaviour of the material, and ii) thickness of the nitrided layer, which was investigated using energy dispersive spectroscopy (EDS) and x-ray elemental analysis. Tensile properties of the gas nitrided Ti64 bars produced by SLM under different conditions were also reported.

Densification, microstructure evolution and fatigue behavior of Ti-13Nb-13Zr alloy processed by selective laser melting

2019 ◽  
Vol 342 ◽  
pp. 11-23 ◽  
Author(s):  
Libo Zhou ◽  
Tiechui Yuan ◽  
Ruidi Li ◽  
Jianzhong Tang ◽  
Guohua Wang ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Microstructure Evolution ◽  
Fatigue Behavior ◽  
Laser Melting ◽  
13Zr Alloy

Fatigue behavior of biomedical Co–Cr–Mo–W alloy fabricated by selective laser melting

2020 ◽  
Vol 795 ◽  
pp. 140000
Author(s):  
Xin Dong ◽  
Yanan Zhou ◽  
Qi Sun ◽  
Yuntao Qu ◽  
Haojiang Shi ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Fatigue Behavior ◽  
Laser Melting

Fabrication of Knee Prostheses by Means of SLM: Process and Functional Characterization

2018 ◽  
Author(s):  
Erica Liverani ◽  
Michele Conconi ◽  
Nicola Sancisi ◽  
Adrian H. A. Lutey ◽  
Alessandro Ascari ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Process Parameters ◽  
Functional Characterization ◽  
Heat Treatments ◽  
Knee Prostheses ◽  
Laser Melting ◽  
3D Scanner ◽  
Optimization Of Process Parameters ◽  
Design And Production

This article presents manufacturing of exemplary knee prostheses using selective laser melting (SLM) technology. All phases of design and production are considered, from acquisition of the STL build file to optimization of process parameters, printing and post-build heat treatments. Geometric differences are acquired and compared with a 3D scanner.

scholarly journals Laser Polishing of Ti6Al4V Fabricated by Selective Laser Melting

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 191 ◽  
Author(s):  
Chunyong Liang ◽  
Yazhou Hu ◽  
Ning Liu ◽  
Xianrui Zou ◽  
Hongshui Wang ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Surface Defects ◽  
Fatigue Behavior ◽  
Osteoblastic Differentiation ◽  
Laser Melting ◽  
Laser Polishing ◽  
Laser Process ◽  
High Roughness ◽  
Dental Applications

Selective laser melting (SLM) is emerging as a promising 3D printing method for orthopedic and dental applications. However, SLM-based Ti6Al4V components frequently exhibit high roughness values and partial surface defects. Laser polishing (LP) is a newly developed technology to improve the surface quality of metals. In this research, LP is applied to improve the surface finish of components. The results show that the laser beam can neatly ablate the aggregates of metallic globules and repair cracks and pores on the surface, resulting in a smooth surface with nanocomposites. Overall, the results indicate that using LP optimizes surface morphology to favor fatigue behavior and osteoblastic differentiation. These findings provide foundational data to improve the surface roughness of a laser-polished implant and pave the way for optimized mechanical behavior and biocompatibility via the laser process.

Sign in / Sign up

Export Citation Format

Share Document