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Makoto Watanabe
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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
Heat Source Model Development for Thermal Analysis of Laser Powder Bed Fusion Using Bayesian Optimization and Machine Learning
Description/Abstract:
To understand the correlation between process, structures, and properties in laser powder bed fusion (L-PBF), it is essential to use nume...
Keyword:
Bayesian optimization
,
Heat source model
,
Laser powder bed fusion
,
Laser scanning conditions
,
Multiple linear regression
, and
Thermal analysis
Resource Type:
Article
Author:
Masahiro Kusano
and
Makoto Watanabe
Journal:
Integrating Materials and Manufacturing Innovation
Date Uploaded:
09/04/2024
Particle Size Effect on Powder Packing Properties and Molten Pool Dimensions in Laser Powder Bed Fusion Simulation
Description/Abstract:
Various defects are produced during laser powder bed fusion (L-PBF) process, and can affect the quality of the fabricated part. Past stud...
Keyword:
discrete-element method
,
laser powder bed fusion
,
multiphysics CFD simulation
,
packing fraction
,
packing homogeneity
,
particle size
, and
powder spreading
Resource Type:
Article
Author:
Jun Katagiri
,
Sukeharu Nomoto
,
Masahiro Kusano
, and
Makoto Watanabe
Journal:
Journal of Manufacturing and Materials Processing
Date Uploaded:
05/04/2024
Solute segregation in a rapidly solidified Hastelloy-X Ni-based superalloy during laser powder bed fusion investigated by phase-field and computational thermal-fluid dynamics simulations
Description/Abstract:
Solute segregation significantly affects material properties and is a critical issue in the laser powder-bed fusion (LPBF) additive manuf...
Keyword:
Computational thermal-fluid dynamics simulation
,
Hastelloy-X nickel-based superalloy
,
Laser powder-bed fusion
,
Phase-field method
, and
Solute element segregation
Resource Type:
Article
Author:
Masayuki Okugawa
,
Kenji Saito
,
Haruki Yoshima
,
Katsuhiko Sawaizumi
,
Sukeharu Nomoto
,
Makoto Watanabe
,
Takayoshi Nakano
, and
Yuichiro Koizumi
Journal:
Additive Manufacturing
Date Uploaded:
02/04/2024
Influence of recoil pressure, mushy zone flow resistance and reflectivity on melt pool shape in laser powder bed fusion simulation
Description/Abstract:
Melt pool dimensions (depth: <i>D</i> and width: <i>W</i>) are strongly correlated with defects generated in laser powder bed fusion. The...
Keyword:
Fresnel laser reflection model
,
Laser powder bed fusion
,
Melt pool shape
,
Multi-physics CFD simulation
,
Mushy zone flow resistance
, and
Recoil pressure
Resource Type:
Article
Author:
Jun Katagiri
,
Masahiro Kusano,
,
Sukeharu Nomoto
, and
Makoto Watanabe
Journal:
Case Studies in Thermal Engineering
Date Uploaded:
10/10/2023
Date Modified:
10/10/2023
Prediction of continuous cooling transformation diagram for weld heat affected zone by machine learning
Description/Abstract:
The continuous cooling transformation (CCT) diagram of steels is very important in considering the phase transformation depending on the ...
Keyword:
CCT
Resource Type:
Article
Author:
Satoshi Minamoto
,
Susumu Tsukamoto
,
Tadashi Kasuya
,
Makoto Watanabe
, and
Masahiko Demura
Date Uploaded:
09/02/2023
Date Modified:
20/03/2024
Virtual heat treatment for γ-γ′ two-phase Ni-Al alloy on the materials Integration system, MInt
Description/Abstract:
Aiming to designing the aging heat treatment conditions to maximize the 0.2 % proof stress of γ-γ′ two-phase Ni-based superalloys, we dev...
Keyword:
Image analysis
,
Ni-Al alloy
,
Phase field simulation
, and
γ-γ′two-phase
Resource Type:
Article
Author:
Toshio Osada
,
Toshiyuki Koyama
,
Dmitry S. Bulgarevich
,
Satoshi Minamoto
,
Makoto Osawa
,
Makoto Watanabe
,
Kyoko Kawagishi
, and
Masahiko Demura
Date Uploaded:
01/02/2023
Date Modified:
02/05/2024
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Laser powder bed fusion
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4
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Creative Commons BY Attribution 4.0 International
5
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Makoto Watanabe
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Masahiro Kusano
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Japan Society for the Promotion of Science
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Japan Science and Technology Agency
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Innovative Science and Technology Initiative for Security
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Additive Manufacturing
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Case Studies in Thermal Engineering
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Integrating Materials and Manufacturing Innovation
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Journal of Manufacturing and Materials Processing
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Journal of Materials Research and Technology
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