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Hiroshi Oka

Assistant Professor

Hokkaido University

Japan

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Research Interests

Materials Chemistry

100%

Condensed Matter Physics

70%

Alloy Chemistry

100%

High-temperature Engineering

60%

Hydrogen Embrittlement

40%

Ion Irradiation

40%

Spark Plasma Sintering

40%

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Articles19

Hydrogen absorption and desorption properties of Li-Mg-Al-Ti-M based lightweight high entropy alloys

Article Link

Year:

2025

Controlling the diffusion behavior in diffusion bonded reduced activation Cr0.8FeMn1.3Ni1.3 high entropy alloy/316SS joints through dislocations

Article Link

Year:

2025

Fabrication of Zr3AlC2 by Spark Plasma Sintering

Article Link

Year:

2025

Influence of He injection amount on the microstructure of ion irradiated Cr0.8FeMnNi medium entropy alloy compared with 316L stainless steel

Article Link

Year:

2024

Effects of vacuum heat treatment on novel Co-free Al0·9Cr0·8FeMn0·8Ni2.0 eutectic high entropy alloy: Microstructure evolution and mechanical properties

Article Link

Year:

2024

Role of aging temperature on thermal stability of Co-free Cr0.8FeMn1.3Ni1.3 high-entropy alloy: Decomposition and embrittlement at intermediate temperatures

Article Link

Year:

2024

Effects of Mn Content on Microstructure and Mechanical Properties of Co-Free Medium Entropy Alloys in the Cr-Fe-Mn-Ni System

Article Link

Year:

2024

Vacuum diffusion bonding between equiatomic CoCrNi-based concentrated solid solution alloys system and 316 stainless steel by spark plasma sintering

Article Link

Year:

2023

Irradiation behavior of HfNbTaTiV in comparison of HfNbTaTiZr and F82H

Article Link

Year:

2023

Overcoming strength-ductility trade-off in CoCrNi medium entropy alloy by forming fine crescent grains in laser powder-bed fusion

Article Link

Year:

2023

Study on Reduced Activation High Entropy Alloys for Nuclear Application

Article Link

Year:

2023

Synthesis of Li-Mg-Al-Ti based lightweight high entropy alloys by mechanical alloying and investigation of conditions for solid solution formation

Article Link

Year:

2023

Unveiling the effect of Ni interlayer on diffusion bonded reduced activation Cr0.8FeMnNi medium entropy alloy/316 stainless steel joint: Interfacial microstructure, diffusion behavior and mechanical properties

Article Link

Year:

2023

Effect of stacking fault energy on irradiation damage in reduced activation high entropy alloys

Article Link

Year:

2022

Effect of Al on oxidation behavior of AlxCrCuFeNi2 (x = 0.2, 0.4, 0.6) high entropy alloys

Article Link

Year:

2022

Effect of nitrogen concentration on creep strength and microstructure of 9Cr-ODS ferritic/martensitic steel

Article Link

Year:

2022

Improvement of thermal conductivity by adding tungsten and/or copper wire in F82H

Article Link

Year:

2022

Study on irradiation effects of refractory bcc high-entropy alloy

Article Link

Year:

2022

Oxidation Behavior of Cu-Containing Concentrated Solid Solution Alloys under Steam Conditions

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Year:

2021

Collaborators3

Kohta Asano

Visiting Professor

Meiji University

JAPAN

shigehito isobe

Hokkaido University

JAPAN

Naoyuki Hashimoto

Professor

Hokkaido University

JAPAN

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Hiroshi Oka

Assistant Professor

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Research Interests

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Articles19

Hydrogen absorption and desorption properties of Li-Mg-Al-Ti-M based lightweight high entropy alloys

Controlling the diffusion behavior in diffusion bonded reduced activation Cr0.8FeMn1.3Ni1.3 high entropy alloy/316SS joints through dislocations

Fabrication of Zr<sub>3</sub>AlC<sub>2</sub> by Spark Plasma Sintering

Influence of He injection amount on the microstructure of ion irradiated Cr0.8FeMnNi medium entropy alloy compared with 316L stainless steel

Effects of vacuum heat treatment on novel Co-free Al0·9Cr0·8FeMn0·8Ni2.0 eutectic high entropy alloy: Microstructure evolution and mechanical properties

Role of aging temperature on thermal stability of Co-free Cr0.8FeMn1.3Ni1.3 high-entropy alloy: Decomposition and embrittlement at intermediate temperatures

Effects of Mn Content on Microstructure and Mechanical Properties of Co-Free Medium Entropy Alloys in the Cr-Fe-Mn-Ni System

Vacuum diffusion bonding between equiatomic CoCrNi-based concentrated solid solution alloys system and 316 stainless steel by spark plasma sintering

Irradiation behavior of HfNbTaTiV in comparison of HfNbTaTiZr and F82H

Overcoming strength-ductility trade-off in CoCrNi medium entropy alloy by forming fine crescent grains in laser powder-bed fusion

Study on Reduced Activation High Entropy Alloys for Nuclear Application

Synthesis of Li-Mg-Al-Ti based lightweight high entropy alloys by mechanical alloying and investigation of conditions for solid solution formation

Unveiling the effect of Ni interlayer on diffusion bonded reduced activation Cr0.8FeMnNi medium entropy alloy/316 stainless steel joint: Interfacial microstructure, diffusion behavior and mechanical properties

Effect of stacking fault energy on irradiation damage in reduced activation high entropy alloys

Effect of Al on oxidation behavior of Al<sub>x</sub>CrCuFeNi<sub>2</sub> (x = 0.2, 0.4, 0.6) high entropy alloys

Effect of nitrogen concentration on creep strength and microstructure of 9Cr-ODS ferritic/martensitic steel

Improvement of thermal conductivity by adding tungsten and/or copper wire in F82H

Study on irradiation effects of refractory bcc high-entropy alloy

Oxidation Behavior of Cu-Containing Concentrated Solid Solution Alloys under Steam Conditions

Collaborators3

Kohta Asano

shigehito isobe

Naoyuki Hashimoto

How do I reach out?

Hiroshi Oka

Assistant Professor

How do I reach out?

Contact this professor

Research Interests

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Articles19

Hydrogen absorption and desorption properties of Li-Mg-Al-Ti-M based lightweight high entropy alloys

Controlling the diffusion behavior in diffusion bonded reduced activation Cr0.8FeMn1.3Ni1.3 high entropy alloy/316SS joints through dislocations

Fabrication of Zr&lt;sub&gt;3&lt;/sub&gt;AlC&lt;sub&gt;2&lt;/sub&gt; by Spark Plasma Sintering

Influence of He injection amount on the microstructure of ion irradiated Cr0.8FeMnNi medium entropy alloy compared with 316L stainless steel

Effects of vacuum heat treatment on novel Co-free Al0·9Cr0·8FeMn0·8Ni2.0 eutectic high entropy alloy: Microstructure evolution and mechanical properties

Role of aging temperature on thermal stability of Co-free Cr0.8FeMn1.3Ni1.3 high-entropy alloy: Decomposition and embrittlement at intermediate temperatures

Effects of Mn Content on Microstructure and Mechanical Properties of Co-Free Medium Entropy Alloys in the Cr-Fe-Mn-Ni System

Vacuum diffusion bonding between equiatomic CoCrNi-based concentrated solid solution alloys system and 316 stainless steel by spark plasma sintering

Irradiation behavior of HfNbTaTiV in comparison of HfNbTaTiZr and F82H

Overcoming strength-ductility trade-off in CoCrNi medium entropy alloy by forming fine crescent grains in laser powder-bed fusion

Study on Reduced Activation High Entropy Alloys for Nuclear Application

Synthesis of Li-Mg-Al-Ti based lightweight high entropy alloys by mechanical alloying and investigation of conditions for solid solution formation

Unveiling the effect of Ni interlayer on diffusion bonded reduced activation Cr0.8FeMnNi medium entropy alloy/316 stainless steel joint: Interfacial microstructure, diffusion behavior and mechanical properties

Effect of stacking fault energy on irradiation damage in reduced activation high entropy alloys

Effect of Al on oxidation behavior of Al<sub>x</sub>CrCuFeNi<sub>2</sub> (x = 0.2, 0.4, 0.6) high entropy alloys

Effect of nitrogen concentration on creep strength and microstructure of 9Cr-ODS ferritic/martensitic steel

Improvement of thermal conductivity by adding tungsten and/or copper wire in F82H

Study on irradiation effects of refractory bcc high-entropy alloy

Oxidation Behavior of Cu-Containing Concentrated Solid Solution Alloys under Steam Conditions

Collaborators3

Kohta Asano

shigehito isobe

Naoyuki Hashimoto

How do I reach out?

Fabrication of Zr<sub>3</sub>AlC<sub>2</sub> by Spark Plasma Sintering