Feedback control effects on dimensions and defects of H13 tool steel by direct metal deposition process

2005 ◽  
Vol 17 (2) ◽  
pp. 118-126 ◽  
Author(s):  
Y. Hua ◽  
J. Choi
Keyword(s):  
Feedback Control ◽  
Tool Steel ◽  
Deposition Process ◽  
Metal Deposition ◽  
Direct Metal Deposition ◽  
H13 Tool Steel

The direct metal deposition of H13 tool steel for 3-D components

JOM ◽  
1997 ◽  
Vol 49 (5) ◽  
pp. 55-60 ◽  
Author(s):  
J. Mazumder ◽  
J. Choi ◽  
K. Nagarathnam ◽  
J. Koch ◽  
D. Hetzner
Keyword(s):  
Tool Steel ◽  
Metal Deposition ◽  
Direct Metal Deposition ◽  
H13 Tool Steel

scholarly journals The direct metal deposition of H13 tool steel for 3-D components

JOM ◽  
1997 ◽  
Vol 49 (8) ◽  
pp. 8-8 ◽  
Author(s):  
J. Mazumder ◽  
J. Choi ◽  
K. Nagarathnam ◽  
J. Koch ◽  
D. Hetzner
Keyword(s):  
Tool Steel ◽  
Metal Deposition ◽  
Direct Metal Deposition ◽  
H13 Tool Steel

Direct metal deposition (DMD) of H13 tool steel on copper alloy substrate: Evaluation of mechanical properties

2011 ◽  
Vol 528 (9) ◽  
pp. 3342-3349 ◽  
Author(s):  
M. Khalid Imran ◽  
S.H. Masood ◽  
Milan Brandt ◽  
Sudip Bhattacharya ◽  
Jyotirmoy Mazumder
Keyword(s):  
Mechanical Properties ◽  
Tool Steel ◽  
Copper Alloy ◽  
Metal Deposition ◽  
Direct Metal Deposition ◽  
Alloy Substrate ◽  
H13 Tool Steel

A Study of Microstructure and Surface Hardness of Parts Fabricated by Laser Direct Metal Deposition Process

2010 ◽  
Vol 129-131 ◽  
pp. 648-651 ◽  
Author(s):  
Mehdi Soodi ◽  
Milan Brandt ◽  
Syed H. Masood
Keyword(s):  
Stainless Steel ◽  
Tool Steel ◽  
316L Stainless Steel ◽  
Surface Hardness ◽  
Deposition Process ◽  
Metal Deposition ◽  
Direct Metal Deposition ◽  
Significant Difference ◽  
Aluminium Bronze ◽  
Hardness Values

This paper presents an investigation on the microstructure and surface hardness of the parts fabricated by laser assisted Direct Metal Deposition (DMD) technology. A series of engineering metallic alloy powders were used in the DMD process to produce simple 3D geometric structures. The alloy powders investigated include: 316L stainless steel, 420 Stainless Steel, Stellite(R) 6, tool steel (H13), Cholmoloy (Ni Based alloy), and Aluminium Bronze. These were chosen due to their frequent application in engineering parts and components. The microstructure and hardness values have been compared to those of the wrought products (as annealed) as reported in the SAE standards, Heat treater’s guide to metals ASM international, and material data sheets supplied by the materials manufacturers. A significant difference is reported in both hardness and microstructure of the laser deposited samples compared to those of the wrought form.

Experimental and Numerical Analysis of the Powder Flow in a Multi-Channel Coaxial Nozzle of a Direct Metal Deposition System

2021 ◽  
Vol 143 (7) ◽  
Author(s):  
Piyush Pant ◽  
Dipankar Chatterjee ◽  
Sudip Kumar Samanta ◽  
Aditya Kumar Lohar
Keyword(s):  
Gas Flow ◽  
Flow Characteristics ◽  
Turbulence Models ◽  
Deposition Process ◽  
Metal Deposition ◽  
Direct Metal Deposition ◽  
Powder Flow ◽  
Coaxial Nozzle ◽  
Proposed Model ◽  
Blown Powder

Abstract The work explores the powder transport process, using numerical simulation to address the dynamics of the powder flow in an in-house built multi-channel coaxial nozzle of a direct metal deposition (DMD) system. The fluid turbulence is handled by the standard k–ɛ and k–ω turbulence models, and the results are compared in order to predict their suitability. An image-based technique using CMOS camera is adopted to determine the powder flow characteristics. The model is validated with the in-house experimental results and verified available results in the literature. The findings of this work confirms the application of the k–ω model for powder gas flow investigations in blown powder additive manufacturing (AM) processes due to its better predictive capability. The proposed model will assist in simulating the direct metal deposition process.

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