In-situ synthesis of Ti-Fe-based alloys prepared by the combination of mechanical alloying and laser melting deposition: Microstructure and corrosion resistance

2018 ◽  
Vol 768 ◽  
pp. 697-706 ◽  
Author(s):  
Shengfeng Zhou ◽  
Yongbo Xu ◽  
Bangquan Liao ◽  
Yajuan Sun ◽  
Xiaoqin Dai ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Mechanical Alloying ◽  
In Situ Synthesis ◽  
Laser Melting ◽  
Laser Melting Deposition

scholarly journals Mechanical Properties of In-Situ Synthesis of Ti-Ti3Al Metal Composite Prepared by Selective Laser Melting

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1121 ◽  
Author(s):  
Li ◽  
Liang ◽  
Tian ◽  
Yang ◽  
Xie ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Selective Laser Melting ◽  
Melting Process ◽  
In Situ Synthesis ◽  
Metal Composite ◽  
Dispersion Strengthening ◽  
Laser Melting ◽  
Compression Properties

Titanium composite strengthened by Ti3Al precipitations is considered to be one of the excellent materials that is widely used in engineering. In this work, we prepared a kind of Ti-Ti3Al metallic composite by in-situ synthesis technology during the SLM (selective laser melting) process, and analyzed its microstructure, wear resistance, microhardness, and compression properties. The results showed that the Ti-Ti3Al composite, prepared by in-situ synthesis technology based on SLM, had more homogeneous Ti3Al-enhanced phase dispersion strengthening structure. The grain size of the workpiece was about 1 μm, and that of the Ti3Al particle was about 200 nm. Granular Ti3Al was precipitated after the aluminum-containing workpiece formed, with a relatively uniform distribution. Regarding the mechanical properties, the hardness (539 HV) and the wear resistance were significantly improved when compared with the Cp-Ti workpiece. The compressive strength of the workpiece increased from 886.32 MPa to 1568 MPa, and the tensile strength of the workpiece increased from 531 MPa to 567 MPa after adding aluminum. In the future, the combination of in-situ synthesis technology and SLM technology can be used to flexibly adjust the properties of Ti-based materials.

scholarly journals In-situ synthesis of aluminum/nano-quasicrystalline Al-Fe-Cr composite by using selective laser melting

2018 ◽  
Vol 155 ◽  
pp. 382-390 ◽  
Author(s):  
N. Kang ◽  
M. El Mansori ◽  
X. Lin ◽  
F. Guittonneau ◽  
H.L. Liao ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
In Situ Synthesis ◽  
Laser Melting

In-situ synthesis of Ti2AlNb-based intermetallic alloy by selective laser melting

2017 ◽  
Vol 704 ◽  
pp. 434-442 ◽  
Author(s):  
Alexey Grigoriev ◽  
Igor Polozov ◽  
Vadim Sufiiarov ◽  
Anatoly Popovich
Keyword(s):  
Selective Laser Melting ◽  
In Situ Synthesis ◽  
Intermetallic Alloy ◽  
Laser Melting

Laser melting deposition of duplex stainless-steel coating on high strength low alloy pipeline steels for improving wear and corrosion resistance

2019 ◽  
Vol 9 (9) ◽  
pp. 1009-1016
Author(s):  
Xu Wang ◽  
Kaiping Du ◽  
Qiongyu Zhou ◽  
Ping Ou ◽  
Derong Zhang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Stainless Steels ◽  
High Speed ◽  
Electrochemical Impedance ◽  
High Strength ◽  
Duplex Stainless Steels ◽  
Phase Identification ◽  
Laser Melting ◽  
Pipeline Steels ◽  
Laser Melting Deposition

In this paper, a duplex stainless steels coating was successfully prepared on high strength low alloy (HSLA) pipeline steels by laser melting deposition. The microstructure and phase identification of the obtained coating were identified by scanning electron microscope (SEM) and X-ray diffraction (XRD). The tribological behavior and corrosion behavior were investigated by high-speed reciprocating friction and wear tester, polarization test, Eocp–t curves and electrochemical impedance spectroscopy (EIS). Results show that the obtained coating is bonded metallurgically with the substrate and comprises α, γ, M2B and (Fe, Cr)23C6 phase. In addition, the obtained coating shows nearly 22.5% improvement in wear resistance over the substrate and much better corrosion resistance due to its nobler open circuit potential (Eocp), corrosion current density (i corr) and bigger impedance value than the substrate, confirming that the laser melting deposited duplex stainless steels coating can be a promising candidate for the protective coating of HSLA pipeline steels.

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