Effects of substrate preheating on the thin-wall part built by laser metal deposition shaping

2014 ◽  
Vol 317 ◽  
pp. 839-855 ◽  
Author(s):  
Kai Zhang ◽  
Shijie Wang ◽  
Weijun Liu ◽  
Risheng Long
Keyword(s):  
Metal Deposition ◽  
Thin Wall ◽  
Laser Metal Deposition ◽  
Substrate Preheating ◽  
Thin Wall Part

Microstructure and Properties of Thin-Wall Part by Laser Metal Deposition Shaping

2011 ◽  
Vol 675-677 ◽  
pp. 563-566 ◽  
Author(s):  
Kai Zhang ◽  
Xiao Feng Shang
Keyword(s):  
Mechanical Properties ◽  
Computer Aided Design ◽  
Metal Deposition ◽  
Advanced Technology ◽  
Rapid Manufacturing ◽  
Thin Wall ◽  
Laser Metal Deposition ◽  
Metallic Parts ◽  
Aided Design ◽  
Thin Wall Part

Laser additive direct deposition of metals is a new rapid manufacturing technology, which combines with computer aided design, laser cladding and rapid prototyping. The advanced technology can build fully-dense metal components directly from CAD files without a mould or tool. With this technology, a promising rapid manufacturing system called “Laser Metal Deposition Shaping (LMDS)” is being constructed and developed. Through the LMDS technology, fully-dense and near-net shaped metallic parts can be directly obtained through melting coaxially fed powder with a laser. Typically, the microstructure and mechanical properties of the as-formed thin-wall part were tested and analyzed synthetically. The results show that there are different grain categories distributing in certain position of thin-wall part, and the mechanical properties represent as anisotropy.

Laser Metal Deposition of Fe- and Co-Based Shape-Memory Alloys

2021 ◽  
Vol 1161 ◽  
pp. 105-112
Author(s):  
Niklas Sommer ◽  
Gabriel Mienert ◽  
Malte Vollmer ◽  
Christian Lauhoff ◽  
Philipp Krooß ◽  
...  
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Microstructural Evolution ◽  
Microstructural Analysis ◽  
Metal Deposition ◽  
Thin Wall ◽  
Laser Metal Deposition ◽  
Wall Structures ◽  
Iron Based ◽  
First Time

In the present study, Iron-based FeMnAlNi and Cobalt-based CoNiGa shape-memory alloys (SMA) were processed by laser metal deposition for the first time. The materials show susceptibility to cracking upon processing when unheated substrates are employed. Pre-heating of the substrate materials eliminated cracking completely and enabled robust deposition of thin-wall structures. Microstructural analysis using optical microscopy revealed different microstructural evolution for the two materials considered.

Analysis on surface finish of thin-wall parts by laser metal deposition with annular beam

2019 ◽  
Vol 119 ◽  
pp. 105605 ◽  
Author(s):  
Jinchao Zhang ◽  
Shihong Shi ◽  
Geyan Fu ◽  
Jianjun Shi ◽  
Gangxian Zhu ◽  
...  
Keyword(s):  
Surface Finish ◽  
Metal Deposition ◽  
Thin Wall ◽  
Laser Metal Deposition ◽  
Annular Beam

scholarly journals Ageing response of an Al-Mg-Mn-Sc-Zr alloy processed by laser metal deposition in thin-wall structures

Vacuum ◽  
2018 ◽  
Vol 158 ◽  
pp. 121-125 ◽  
Author(s):  
Tong Zhao ◽  
Wangcan Cai ◽  
Marius Dahmen ◽  
Jonathan Schaible ◽  
Chen Hong ◽  
...  
Keyword(s):  
Metal Deposition ◽  
Thin Wall ◽  
Laser Metal Deposition ◽  
Wall Structures ◽  
Zr Alloy

scholarly journals Comparison of Substrate Preheating on Mechanical and Microstructural Properties of Hybrid Specimens Fabricated by Laser Metal Deposition 316 L with Different Wrought Steel Substrate

Crystals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 891
Author(s):  
Yuhui Zhao ◽  
Zhiguo Wang ◽  
Jibin Zhao ◽  
Zhenfeng He ◽  
Hongwei Zhang
Keyword(s):  
Steel Substrate ◽  
Interfacial Microstructure ◽  
Metal Deposition ◽  
Laser Metal Deposition ◽  
Adhesion Properties ◽  
Substrate Preheating ◽  
The Difference ◽  
Mechanical And Microstructural Properties ◽  
1045 Steel ◽  
Deposition Height

The combination of additive manufacturing and conventional metal forming processes provides the possibility for improvements of forming efficiency and flexibility. Substrate preheating is an implementable technique to improve the interface adhesion properties of the hybrid forming method. The present experiment investigates the adhesion of additive manufactured 316 L steel on P20 and 1045 steel substrates under two substrate temperatures, and the geometrical characterization, interfacial microstructure and mechanical property of the hybrid specimens were compared. As a result, it was found that the ratio of deposition height to the width was reduced and the width was increased under substrate preheating. Tensile results show that the ultimate strength of 1045 and 316 L hybrid specimens was obviously increased, while the properties of hybrid specimens P20 and 316 L were similar, under different substrate temperature conditions. For the hybrid specimens with the metallurgically bonding characteristic, the tensile properties can reach the level of 316 L depositioned specimens fabricated by laser metal deposition (LMD). Furthermore, substrate preheating had little effect on the microstructure of the laser metal deposition zone, and significant influence on the microstructure of the heat affected zone, which was reflected in the difference of the hardness distribution.

Study on Misalignment of Focus Position in Laser Metal Deposition Shaping Processing

2009 ◽  
Vol 16-19 ◽  
pp. 1218-1222
Author(s):  
Feng Jie Tian ◽  
Wei Jun Liu ◽  
Xiao Feng Shang ◽  
Guang Yang
Keyword(s):  
Laser Beam ◽  
Surface Quality ◽  
Metal Deposition ◽  
Thin Wall ◽  
Focus Position ◽  
Laser Metal Deposition ◽  
Single Track ◽  
Random Direction ◽  
Detecting Method

In order to investigate the effect on manufacturing quality of focus position misalignment between laser beam and powder convergence in laser metal deposition shaping (LMDS) processing, several experiments including single-track monolayer, straight thin-wall and ring thin-wall were made. The measurements and analysis on shape, size and surface quality of the experiment parts were carried out. An omnidirectional detecting method to check the misalignment of focus position was brought forward and tested. The results indicate that the misalignment of focus position directly affects the quality of shaping parts and shows the regularity, the detecting method can easily detect the focus position misalignment on random direction and angle and guide the adjustment on them.

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