Results 251 to 260 of about 431,646 (304)

Development of powder distribution model of discontinuous coaxial powder stream in laser direct metal deposition

Powder Technology, 2018
For laser direct metal deposition (LDMD) process, a general powder distribution model of discontinuous coaxial powder stream (DCPS) was developed based on homogeneous transformation.
Jiazhu Wu, Penghui Zhao, Haiying Wei, Qida Lin, Yi Zhang   +4 more
semanticscholar   +1 more source

Development of a Multi-Directional Metal 3D Printing System Based on Direct Metal Deposition

Volume 1: Additive Manufacturing; Manufacturing Equipment and Systems; Bio and Sustainable Manufacturing, 2019
Abstract Process parameters, including deposition direction, are crucial in direct metal deposition (DMD) for microstructure formation and mechanical properties of the final part. Multi-directional deposition along with in-situ deposition control can minimize deposition anisotropy and improve dimensional accuracy.
Shiming Gao, Wei-Hsin Liao, Ping Guo
openaire   +1 more source

Direct Three-Dimensional Layer Metal Deposition

Journal of Manufacturing Science and Engineering, 2010
Multi-axis slicing for solid freeform fabrication manufacturing processes can yield nonuniform thickness layers or three-dimensional (3D) layers. The traditional parallel layer construction approach to building such layers leads to the so-called staircase effect, which requires machining or other postprocessing to form the desired shape.
Jianzhong Ruan, Lie Tang, Frank W. Liou, Robert G. Landers   +3 more
openaire   +1 more source

Solidification in direct metal deposition by LENS processing

JOM, 2001
Thermal imaging and metallographic analysis were used to study Laser Engineered Net Shaping (LENS™) processing of 316 stainless steel and H13 tool steel. The cooling rates at the solid-liquid interface were measured over a range of conduction conditions.
William Hofmeister, Michelle Griffith
openaire   +1 more source

Robust sensing and control of direct metal deposition

PICALO 2008: 3rd Pacific International Conference on Laser Materials Processing, Micro, Nano and Ultrafast Fabrication, 2008
Direct metal deposition is one of the rapid manufacturing technologies to fabricate geometrically complicated, dense, near-net-shape components. Deposition process involves a large number of parameters, among which the laser power is considered as the primary variable. In order to develop a control system for the process, molten pool temperature during
Lijun Song, Jyoti Mazumder
openaire   +1 more source

Wire-based direct metal deposition with Ti6Al4V

Laser 3D Manufacturing VI, 2019
Wire-based additive manufacturing (WBAM) has been a promising alternative compared to the more established metal printing technologies such as powder bed fusion or laser powder deposition, especially in the large structure buildup, due to the benefits such as high deposition rate, low cost of material, and high material usage efficiency.
Shuang Liu, Yaoyu Ding
openaire   +1 more source

Forward and backward modeling of direct metal deposition using metaheuristic algorithms tuned artificial neural network and extreme gradient boost

Progress in Additive Manufacturing, 2022
A. R. Dhar, Dhrubajyoti Gupta, S. Roy, Aditya Kumar Lohar   +3 more
semanticscholar   +1 more source

Direct laser metal deposition of Inconel 738

Materials Science and Engineering: A, 2019
Abstract Inconel 738 is one of the widely used nickel-based superalloys in high-temperature applications, especially in land-based and aerospace gas turbine engines. This paper reports the feasibility of direct laser metal deposition (LMD) of Inconel 738. Cracks evolved during deposition at the substrate/deposit interface and within the deposit along
A. Ramakrishnan, G.P. Dinda
openaire   +1 more source

Characterization of laser direct deposited metallic parts

Journal of Materials Processing Technology, 2003
Abstract Laser direct deposition of metallic parts is a new manufacturing technology, which combines with computer aided design, laser cladding and rapid prototyping. Fully dense metallic parts can be directly obtained through melting coaxially fed powders with a laser.
Yongzhong Zhang, Mingzhe Xi, Shiyou Gao, Likai Shi   +3 more
openaire   +1 more source

Direct metal deposition of functional graded material

ICALEO 2013: 32nd International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing, 2013
Functional graded materials (FGMs) are a class of composite materials that have a continuous variation of properties from one point to another. FGMs are not new but they could be an approach for eliminating the sharp interface between clad and substrate in the laser cladding process.
J. M. Amado, J. N. Montero, M. J. Tobar, A. Yañez   +3 more
openaire   +1 more source