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Makoto Watanabe
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Effect of mushy zone constant in Voller-Prakash model on keyholing behaviour in laser powder bed fusion simulation
Description/Abstract:
This paper is a study of the model constant of the Voller-Prakash model: the mushy zone constant (C), which determines the flow resistanc...
Keyword:
Keyhole pore formation
,
Laser powder bed fusion
,
Multiphysics CFD simulation
,
Mushy zone flow resistance
, and
Voller-Prakash model
Resource Type:
Article
Author:
Jun Katagiri
,
Sukeharu Nomoto
,
Masahiro Kusano
, and
Makoto Watanabe
Journal:
Results in Engineering
Date Uploaded:
10/12/2024
Modified double cantilever beam test method for mode-I energy release rate of elastic adhesive layers
Description/Abstract:
This study proposes a Mode I double cantilever beam (DCB) test method for debonding thick elastic adhesive layers. The approach integrate...
Keyword:
Adhesive layer
,
Bernulli–Euler beam
,
DCB test
,
Elasticity
,
Energy release rate
, and
Winkler’s foundation
Resource Type:
Article
Author:
Tetsuya Morimoto
,
Hisaya Katoh
,
Yuichi Ishida
,
Eiichi Hara
,
Masahiro Kusano
,
Kimiyoshi Naito
,
Makoto Watanabe
,
Kiyoka Takagi
,
Keiji Arai
, and
Koichi Hasegawa
Journal:
Engineering Fracture Mechanics
Date Uploaded:
21/11/2024
Controlling heat accumulation through changing time per layer in laser powder bed fusion of nickel-based superalloy
Description/Abstract:
Feedforward/feedback control of laser powder bed fusion (L-PBF) was proposed over a decade ago but remains challenging. Despite numerous ...
Keyword:
Laser powder bed fusion
,
Nickel-base superalloy
,
Part-scale finite element thermal analysis
,
Temperature control
, and
Time per layer
Resource Type:
Article
Author:
Masahiro Kusano
and
Makoto Watanabe
Journal:
Journal of Manufacturing Processes
Date Uploaded:
21/11/2024
Numerical analysis of Al2O3 and TiO2 growth and oxygen dissolution in a metal substrate during the isothermal oxidation of an α-Ti alloy at 973 K
Description/Abstract:
Oxide growth and O dissolution during the oxidation of an α-Ti alloy at 973 K were simulated using the finite volume method coupled with ...
Keyword:
Kinetic modeling
,
Oxidation
,
Oxide growth
,
Oxygen dissolution
, and
Titanium alloy
Resource Type:
Article
Author:
Tomonori Kitashima
,
Takanobu Hiroto
, and
Makoto Watanabe
Journal:
Journal of Materials Research and Technology
Date Uploaded:
30/09/2024
Fabricating a single-crystal-like β grain structure of a near-β Ti alloy with unique variant selection by laser powder bed fusion
Description/Abstract:
A near-β Ti alloy with a highly anisotropic single-crystal-like β grain structure was fabricated on a polycrystalline pure-Ti substrate b...
Keyword:
Laser powder bed fusion
,
Precipitation
,
Texture
,
Titanium
, and
Variant selection
Resource Type:
Article
Author:
Tomonori Kitashima
,
Takanobu Hiroto
,
Dennis Edgard Jodi
, and
Makoto Watanabe
Journal:
Materials & Design
Date Uploaded:
30/09/2024
Significant creep-strength improvement in modified 9Cr-1Mo steel via microstructural control through laser powder bed fusion
Description/Abstract:
Modified 9Cr-1Mo steel was manufactured using laser powder bed fusion (LPBF). The as-built LPBF-sample microstructure comprised columnar ...
Keyword:
Creep
,
Ferritic steels
,
Laser powder bed fusion
,
Precipitation
, and
δ-ferrite
Resource Type:
Article
Author:
Tomotaka Hatakeyama
,
Kota Sawada
,
Masahiro Kusano
, and
Makoto Watanabe
Journal:
Additive Manufacturing
Date Uploaded:
26/09/2024
Development of Tungsten Repair Technology by Atmospheric Plasma Spraying of Tungsten and Friction Stir Processing
Description/Abstract:
Tungsten (W) has a high melting point, excellent thermal conductivity, and irradiation resistance, making it the most promising plasma fa...
Keyword:
atmospheric plasma spray process
,
divertor
,
friction stir processing
,
microstructure
,
nuclear fusion reactor
, and
tungsten
Resource Type:
Article
Author:
Phuangphaga Daram
,
Yoshiaki Morisada
,
Takuya Ogura
,
Masahiro Kusano
,
JuHyeon Yu
,
Makoto Fukuda
,
Hidetoshi Fujii
,
Seiji Kuroda
, and
Makoto Watanabe
Journal:
Journal of Thermal Spray Technology
Date Uploaded:
13/09/2024
Quantifying Laser Absorptivity of Ti–6Al–4V Powder through Additive Manufacturing Systems
Description/Abstract:
In laser metal-based powder-bed fusion additive manufacturing, it is important to know the laser absorptivity of metal powder to elucidat...
Keyword:
Ti-6Al-4V powder
,
additive manufacturing
,
laser absorptivity
, and
powder-bed fusion
Resource Type:
Article
Author:
Hiroshi Honda
and
Makoto Watanabe
Journal:
MATERIALS TRANSACTIONS
Date Uploaded:
02/09/2024
Microstructure and phase evolution of functionally graded multi-materials of Ni–Ti alloy fabricated by laser powder bed fusion process
Description/Abstract:
The layer-by-layer laser powder bed fusion (L-PBF) process was applied to fabricate functionally graded multi-materials (FGMs) of nickel-...
Keyword:
Compositional gradient
,
Functionally graded materials
,
Laser powder bed fusion process
,
Microstructure
, and
Ni-Ti alloy
Resource Type:
Article
Author:
Phuangphaga Daram
,
Takanobu Hiroto
, and
Makoto Watanabe
Journal:
Journal of Materials Research and Technology
Date Uploaded:
21/06/2024
Effects of time per layer and part geometry on thermal history and microcracking in the fabrication of nickel superalloy samples by laser powder bed fusion
Description/Abstract:
In this work, the purpose of the current study is to understand the effects of time per layer and part geometry on microcracking behavior...
Keyword:
Constricted geometry
,
Inconel 738 LC
,
Laser powder bed fusion
,
Microcracking
,
Thermal analysis
, and
Time per layer
Resource Type:
Article
Author:
Masahiro Kusano
,
Yusuke Takata
,
Atsushi Yumoto
, and
Makoto Watanabe
Journal:
Additive Manufacturing
Date Uploaded:
10/04/2024
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10
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2
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8
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Makoto Watanabe
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Chubu Electric Power Co Inc
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Innovative Science and Technology Initiative for Security
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Additive Manufacturing
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Journal of Materials Research and Technology
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Case Studies in Thermal Engineering
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Integrating Materials and Manufacturing Innovation
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