Microstructure, texture and tensile properties as a function of laser power of Ti48Al2Cr2Nb5Ta alloy prepared by laser additive manufacturing

2022 ◽  
Vol 73 ◽  
pp. 624-632
Author(s):  
Zhanqi Liu ◽  
Guili Yin ◽  
Xiaoou Zhu ◽  
Qi Zhou
Keyword(s):  
Additive Manufacturing ◽  
Tensile Properties ◽  
Laser Power ◽  
Laser Additive Manufacturing

Effect of Isothermal Quenching on Microstructure and Tensile Properties of 12CrNi2 Alloy Steel Prepared by Laser Additive Manufacturing

2020 ◽  
Vol 57 (9) ◽  
pp. 091403
Author(s):  
亢红伟 Kang Hongwei ◽  
董志宏 Dong Zhihong ◽  
张炜 Zhang Wei ◽  
谢玉江 Xie Yujiang ◽  
迟长泰 Chi Changtai ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Tensile Properties ◽  
Alloy Steel ◽  
Isothermal Quenching ◽  
Laser Additive Manufacturing

Laser Transmission Technology of Laser Additive Manufacturing

2013 ◽  
Vol 380-384 ◽  
pp. 4315-4318
Author(s):  
Kai Zhang ◽  
Xiao Feng Shang ◽  
Lei Wang
Keyword(s):  
Additive Manufacturing ◽  
Manufacturing Process ◽  
Laser Power ◽  
Structure Design ◽  
Optical Path ◽  
Metal Component ◽  
Laser Additive Manufacturing ◽  
Generator System ◽  
Additive Manufacturing Technology ◽  
And Function

The laser additive manufacturing technology is a laser assisted direct metal manufacturing process. This process offers the ability to make a metal component directly from CAD drawings. The manufacturing equipment consists of some components. Among them, the laser transmission component plays an important role in the whole fabricating process. It provides the energy source to melt the metal powder, so it is necessary to develop the laser transmission technology. This technology is achieved primarily by laser generator system and optical path transmission system. The related structure design and function implementation prove that the laser transmission technology can generate desirable laser power at precise assigned position, and complete the manufacturing process with flying colors.

Microstructures and Tensile Properties of GH4099 Alloy Fabricated by Laser Additive Manufacturing After Heat Treatment

2018 ◽  
Vol 45 (10) ◽  
pp. 1002003
Author(s):  
吕豪 Lü Hao ◽  
杨志斌 Yang Zhibin ◽  
王鑫 Wang Xin ◽  
喻春光 Yu Chunguang
Keyword(s):  
Heat Treatment ◽  
Additive Manufacturing ◽  
Tensile Properties ◽  
Laser Additive Manufacturing

Quality detection of laser additive manufacturing process based on coaxial vision monitoring

Sensor Review ◽  
2019 ◽  
Vol 39 (4) ◽  
pp. 512-521 ◽  
Author(s):  
Bo Chen ◽  
Yongzhen Yao ◽  
Yuhua Huang ◽  
Wenkang Wang ◽  
Caiwang Tan ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Process Parameters ◽  
Molten Pool ◽  
Laser Power ◽  
Laser Additive Manufacturing ◽  
Content Type ◽  
Melt Pool ◽  
Forming Defects ◽  
The Relationship ◽  
Pool Area

Purpose This paper aims to explore the influences of different process parameters, including laser power, scanning speed, defocusing distance and scanning mode, on the shape features of molten pool and, based on the obtained relationship, realize the diagnosis of forming defects during the process. Design/methodology/approach Molten pool was captured on-line based on a coaxial CCD camera mounted on the welding head, then image processing algorithms were developed to obtain melt pool features that could reflect the forming status, and it suggested that the molten pool area was the most sensitive characteristic. The influence of the processing parameters such as laser power, traverse speed, powder feed rate, defocusing distance and the melt pool area was studied, and then the melt pool area was used as the characteristic to detect the forming defects during the cladding and additive manufacturing process. Findings The influences of different process parameters on molten pool area were explored. Based on the relationship, different types of defects were accurately detected through analyzing the relationship between the molten pool area and time. Originality/value The findings would be helpful for the quality control of laser additive manufacturing.

Microstructures and Properties of 304L Steel CAP1400 Fuel Bottom Nozzles Prepared by Additive Manufacturing Technology

2017 ◽  
Author(s):  
Li Zongshu ◽  
Liu Wentao ◽  
Yang Songtao ◽  
Hao Ruotong
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Fuel Assembly ◽  
Laser Power ◽  
Nuclear Power ◽  
Manufacturing Technology ◽  
Power Station ◽  
Laser Additive Manufacturing ◽  
Additive Manufacturing Technology ◽  
The Matrix

Nozzles of fuel assembly play an important role in pressure water reactor (PWR) fuel assembly element. For a long time, ordinary processing technologies of nozzles of fuel assembly have the problems of difficult and complicated process, the low availability of material and long the development cycles of manufacturing. However, according to the study these issues can be well settled by using the additive manufacturing technology. This paper studies a nozzle of fuel assembly prepared by this additive manufacturing technology through slow-strain-rate tension (SSRT) test and microstructure observation experiment. The results of SSRT test show that yield strength of the nozzle of fuel assembly is about 401.5MPa, the extensional rigidity is about 673.5MPa and the ductility is about 45.7%. And the SEM fracture results of the SSRT sample indicate that the fracture microstructure contains a large number of dimples, and the way of fracture belongs to plastic. And the metallographic observation consequences manifest that the microstructure of nozzle of fuel assembly prepared by the additive manufacturing technology is composite tissue of both austenite and ferrite, and the grains are settled along the way of laser scanning and there are isometric with some kind of direction. This metallographic microstructure is different from the traditional morphology of the free carbide distributed in the matrix. The dual phase microstructure of austenite and ferrite can improve the mechanical properties of the matrix effectively, and avoid the free carbides which may lead to matrix fragmentation in the tensile deformation process. Moreover, the laser power could affect the microstructure and properties of nozzles of fuel assembly observably, and the high laser power could bring about the ablation of metal. Through the analysis of mechanical properties and microstructure, we have made it possible to make the laser additive manufacturing technology to be used for the fuel assembly nozzle preparation in the nuclear power area. This work not only presents the advantages of the laser additive manufacturing technology in the fuel element processing area of the nuclear power station, but also broadens the application range of the laser additive manufacturing technology. What’s more we provide the new thoughts for the fast and effective preparation of the fuel element especially for the fuel assembly nozzle in the nuclear power station.

Effect of δ Aging Treatment on Microstructure and Tensile Properties of Repaired Inconel 718 Alloy Using Laser Additive Manufacturing

2020 ◽  
Vol 47 (1) ◽  
pp. 0102001
Author(s):  
张杰 Zhang Jie ◽  
张群莉 Zhang Qunli ◽  
李栋 Li Dong ◽  
童文华 Tong Wenhua ◽  
姚建华 Yao Jianhua ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Tensile Properties ◽  
Inconel 718 ◽  
Aging Treatment ◽  
Laser Additive Manufacturing ◽  
Inconel 718 Alloy

Dimensional characteristics of Ti-6Al-4V thin-walled parts prepared by wire-based multi-laser additive manufacturing in vacuum

2019 ◽  
Vol 25 (5) ◽  
pp. 849-856 ◽  
Author(s):  
Farui Du ◽  
Jinqian Zhu ◽  
Xueping Ding ◽  
Qi Zhang ◽  
Honglin Ma ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Laser Power ◽  
Manufacturing Industry ◽  
Heat Dissipation ◽  
Cooling Time ◽  
Height Increment ◽  
Laser Additive Manufacturing ◽  
Layer Width ◽  
Content Type ◽  
Thin Walled

Purpose A wire-based additive manufacturing system works with high manufacturing efficiency and low dimensional precision. The purpose of this paper is to study the dimensional characteristics of Ti-6Al-4V thin-walled parts with wire-based multi-laser additive manufacturing in vacuum. Design/methodology/approach Wire-based multi-laser additive manufacturing was carried out to understand the effect brought from different parameters. The Ti-6Al-4V thin-walled parts were formed by different height increments, power inputs and inter-layer cooling times in vacuum. Findings The result shows that, with the number of layers increment, the layer width of thin-walled part increases gradually in the beginning and stabilizes soon afterward. Height increment, laser power and inter-layer cooling time could affect the energy input to the deposited bead and heat accumulation of thin-walled part. The layer width decreases, while the height increment increases. The increment of laser power could increase the layer width. And, the increment of inter-layer cooling time (more than 5 s) has little effect on the layer width. Originality/value The heat dissipation mode of thin-walled parts in vacuum and the influence of different parameters on layer width are explained in this paper. It provides a reference for further understanding and controlling dimension precision of Ti-6Al-4V thin-walled part with wire-based multi-laser additive manufacturing in vacuum. At the same time, it provides a reference for researches of dimensional characteristics in the additive manufacturing industry.

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