scholarly journals Characterization of the Fe-Co-1.5V soft ferromagnetic alloy processed by Laser Engineered Net Shaping (LENS)

2018 ◽  
Vol 21 ◽  
pp. 41-52 ◽  
Author(s):  
Andrew B. Kustas ◽  
Donald F. Susan ◽  
Kyle L. Johnson ◽  
Shaun R. Whetten ◽  
Mark A. Rodriguez ◽  
...  
Keyword(s):  
Ferromagnetic Alloy ◽  
Laser Engineered Net Shaping ◽  
Soft Ferromagnetic ◽  
Net Shaping

Characterization of Laser-Deposited TiAl Alloys

1998 ◽  
Vol 552 ◽  
Author(s):  
X. D. Zhang ◽  
C. Brice ◽  
R. J. Grylls ◽  
D. J. Evans ◽  
H. L. Fraser
Keyword(s):  
Electron Microscopy ◽  
Single Phase ◽  
Lamellar Microstructure ◽  
Operational Parameters ◽  
Tial Alloys ◽  
Laser Engineered Net Shaping ◽  
Transmission Electron ◽  
Net Shaping

ABSTRACTMicrostructure of TiAl produced by Laser Engineered Net Shaping (LENS) has been characterized using optical microscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It has been shown that the substrate has a significant effect on the microstructure deposited. Depending on operational parameters, either equiaxed γ-TiAl/α2 -Ti3AI or single phase α 2 microstructure can be obtained. In-situ heating experiments reveal that nucleation of lamellae often starts at grain boundaries in this retained α 2grains. By careful control of post heat treatment, an ultra fine lamellar microstructure may be obtained, which may significantly improve tensile property in these alloys [3].

ESTUDO DA VIABILIADE DA MANUFATURA ADITIVA DIRETA DE MULITA POR LASER ENGINEERED NET SHAPING (LENS)

2021 ◽  
Author(s):  
Thiago Azevedo ◽  
Italo Leite de Camargo ◽  
Johan sebastian Grass Nunez ◽  
Fábio Mariani ◽  
Reginaldo Coelho ◽  
...  
Keyword(s):  
Laser Engineered Net Shaping ◽  
Net Shaping

Microstructure and mechanical property of TiB reinforced Ti matrix composites fabricated by ultrasonic vibration-assisted laser engineered net shaping

2019 ◽  
Vol 25 (3) ◽  
pp. 581-591 ◽  
Author(s):  
Fuda Ning ◽  
Yingbin Hu ◽  
Weilong Cong
Keyword(s):  
Ultrasonic Vibration ◽  
Acoustic Streaming ◽  
Nonlinear Effects ◽  
Small Variation ◽  
Microstructural Characterization ◽  
Matrix Composites ◽  
Heterogeneous Distribution ◽  
Content Type ◽  
Laser Engineered Net Shaping ◽  
Net Shaping

Purpose The purpose of this paper is to identify if the implementation of ultrasonic vibration in laser engineered net shaping (LENS) process can help to reduce internal weaknesses such as porosity, coarse primary TiB whisker and heterogeneous distribution of TiB reinforcement in the LENS-fabricated TiB reinforced Ti matrix composites (TiB-TMC) parts. Design/methodology/approach An experimental investigation is performed to achieve the results for comparative studies under different fabrication conditions through quantitative data analysis. An approach of microstructural characterization and mechanical testing is conducted to obtain the output attributes. In addition, the theoretical analysis of the physics of ultrasonic vibration in the melting materials is presented to explain the influences of ultrasonic vibration on the microstructural evolution occurred in the part fabrication. Findings Because of the nonlinear effects of acoustic streaming and cavitation induced by ultrasonic vibration, porosity is significantly reduced and a relatively small variation of pore sizes is achieved. Ultrasonic vibration also causes the formation of smaller TiB whiskers that distribute along grain boundaries with a homogeneous dispersion. Additionally, a quasi-continuous network (QCN) microstructure is considerably finer than that produced by LENS process without ultrasonic vibration. The refinements of both reinforcing TiB whiskers and QCN microstructural grains further improve the microhardness of TiB-TMC parts. Originality/value The novel ultrasonic vibration-assisted (UV-A) LENS process of TiB-TMC is conducted in this work for the first time to improve the process performance and part quality.

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