研究者詳細 - 荒川　仁太

論文 - 荒川　仁太

分割表示 36 件中 1 - 20 件目／全件表示 >>

Investigation of factors influencing rotating bending fatigue properties of carburized steel using large data source 査読

Shogo Takesue, Yuki Nakamura, Jinta Arakawa, Koichiro Nambu, Yuji Ichikawa, Hiroyuki Akebono, Kiyotaka Masaki, Shoichi Kikuchi

International Journal of Fatigue 198 109041 - 109041 2025年9月

Clarification of Fatigue Fracture Mechanism on Overlap Friction Stir Welding (FSW) Joints of A5052 Aluminum Alloys 査読

Jinta Arakawa, Shota Ban, Yuki Ogawa, Eitaro Yukutake

Fatigue & Fracture of Engineering Materials & Structures 2025年4月

Effects of elastic anisotropy on the small fatigue crack deflection behavior of α-brass 査読

Jinta Arakawa, Ryushin Kamada, Ryo Yabuki, Yuki Ogawa, Hiroyuki Akebono, Atsushi Sugeta

Journal of Materials Research and Technology 35 3170 - 3182 2025年3月

Evaluation of small fatigue crack deflection behavior on copper using electron backscatter diffraction and crystal plasticity finite element analysis 査読

Jinta Arakawa, Ryo Yabuki, Takeshi Uemori, Masato Ito, Kenichi Yaguchi

Engineering Failure Analysis 170 ( 15 ) 109242 2025年3月

Elucidation of small fatigue crack initiation and propagation behavior on polycrystal Ti-22V-4Al

Jinta Arakawa, Koki Hirazumi, Takeshi Uemori, Yoshito Takemoto

Procedia Structual Integrity 66 ( 2024 ) 38 - 48 2025年1月

ショットピーニングを施した浸炭焼入れ鋼の疲労限度推定

菊池将一, 荒川仁太, 武末翔吾, 南部紘一郎, 中村裕紀, 曙紘之

熱処理 65 ( 1 ) 2025年

Prediction of fatigue crack initiation sites on Ti-22V-4Al using crystal plasticity FEM considering polycrystal orientation and crystal grain size 査読

Progress in Engineering Science 100065 2025年

Ti-10V-2Fe-3Al合金の逆形状記憶効果と靭性回復—Reverse Shape Memory Effect and Toughness Recovery of Ti-10V-2Fe-3Al Alloy 査読

竹元, 嘉利, 四宮, 大輝, 石原, 大暉, 横田, 啓人, 荒川, 仁太

日本金属学会誌 88 ( 10 ) 239 - 244 2024年10月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：The Japan Institute of Metals and Materials

Ti-10V-2Fe-3Al alloys exhibit shape memory (SM) and reverse shape memory (RSM) effects. When an alloy sample that has been strained by external force at room temperature is heated, the strain recovers and SM effect develops at around 300℃, but as the temperature increases further, the shape changes in the opposite direction due to RSM effect at around 450℃. This RSM effect has potential applications in forming processes such as thin-walled pipes, but has the disadvantage that the RSM treatment makes the material very brittle. Therefore, in this study, a heat treatment to restore toughness while maintaining the shape after forming was investigated. The alloy quenched from 1050℃ had a microstructure consisting of a β matrix phase and α′′-martensite (α′′Mq). Differential scanning calorimetry (DSC) results showed that the continuous heating process occurred in the following order: α′′Mq → β reverse transformation, ω formation, ω disappearance, thermally induced α′′iso phase formation, α precipitation and α → β transformation. Ageing at 300℃, where the SM effect appears, caused significant embrittlement due to the formation of the ageing ω phase. Ageing treatment at 450℃, where the RSM effect is obtained, resulted in the formation of a fine α phase, which also caused significant embrittlement. On the other hand, additional aging at 600℃ for 1.8 ks after RSM treatment significantly improved the toughness and produced material properties comparable to aerospace material specifications. It was found that the embrittlement in the RSM treatment was due to the precipitation of fine α phase, and that the growth of α phase with a width of about 0.2 µm or more was required for toughness recovery. It was also found that the specimen shape formed by the RSM treatment hardly changed after the additional heat treatment of 1.8 ks at 600℃.

DOI： 10.2320/jinstmet.j202403

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Crystal plasticity analysis of fatigue crack initiation site considering crystallographic orientation in Ti–22V–4Al alloy 査読

Jinta Arakawa, Koki Hirazumi, Takeshi Uemori, Yoshito Takemoto

Results in Engineering 23 2024年9月

掲載種別：研究論文（学術雑誌）

In this study, plane bending fatigue tests were conducted on Ti–22V–4Al alloy, a β-type titanium alloy, to examine the fatigue crack initiation behavior in detail. In addition, the prediction of fatigue crack initiation points was investigated from the perspectives of the Schmidt factor (SF) and crystal plasticity finite element method (CP-FEM). The slip system contributing to fatigue crack initiation can be accurately predicted by assessing the magnitude relationship of SF. Also, this prediction is already indicated in a lot of paper by using out of component of slip activity. However, the location where the fatigue crack will occur can be not estimated by SF on polycrystalline. Therefore, prediction of grains where fatigue cracks will occur could be achieved with high accuracy by constructing a CP-FEM that considers the mechanical interaction of polycrystals and grain boundary. Utilizing advanced methodologies such as CP-FEM and numerical calculation techniques, it is strictly investigated that the factors influencing fatigue crack initiation in polycrystalline materials. Our research concluded the understanding of fatigue crack initiation on polycrystal grains by considering the mechanical interaction of polycrystals and grain boundary.

DOI： 10.1016/j.rineng.2024.102405

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Relationship between weld rip diameter and fatigue fracture mode for friction stir spot welded tension-peel joints 査読

Miu Hayashi, Itsuki Fujita, Takumi Itadani, Jinta Arakawa, Yasuhiro Aoki, Hidetoshi Fujii, Hiroyuki Akebono, Atsushi Sugeta

Fatigue and Fracture of Engineering Materials and Structures 47 ( 6 ) 2127 - 2138 2024年6月

掲載種別：研究論文（学術雑誌）

In this study, the effects of variations in the weld rip diameter on fatigue properties were investigated based on the fatigue fracture mechanism using tensile peeling-type friction stir spot welding (FSSW) joints. The results of the fatigue test showed that the high and low applied force ranges exhibited base metal fracture and weld area fracture, respectively, and the difference in the weld rip diameter hardly affected the fatigue life. In contrast, in the middle-applied force range, the fracture morphology changes as the weld rip diameter decreases, and it is apparent that joints exhibiting weld area fracture decrease the fatigue life. The fatigue fracture morphology of the tensile peeling-type FSSW joints can be described by a competing risk model between the weld rip diameter. Increasing the heat input during joining, thereby increasing the crack propagation resistance at the pressure fusion interface, can suppress weld area fracture.

DOI： 10.1111/ffe.14295

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Ti-10V-2Fe-3Al合金の逆形状記憶効果と靭性回復

竹元嘉利, 四宮大輝, 石原大暉, 横田啓人, 荒川仁太

日本金属学会誌(Web) 88 ( 10 ) 2024年

Fatigue Limit Diagram for Ferritic Stainless Steels Subjected to Excess Deformation under Fixed Maximum Stress Conditions 査読

Miu Hayashi, Takeshi Ando, Ryohei Gonda, Keishi Kitabatake, Jinta Arakawa, Hiroyuki Akebono, Atsushi Sugeta

Materials Transactions 65 ( 5 ) 512 - 517 2024年

掲載種別：研究論文（学術雑誌）

In this study, experimental investigations were conducted to create fatigue limit diagrams for NSSC180 ferritic stainless steel, which is used for automobile exhaust system parts, subjected to excess deformation, in order to clarify the relationship between the mean stress and fatigue limit. The fatigue tests were conducted under a fixed maximum stress, which allowed a fatigue design diagram to be obtained. The results indicated that the fatigue limit curve has a region where the effect of increasing the mean stress on the decrease in the fatigue limit is more moderate than that predicted by a modified Goodman line. Furthermore, it was found that a fatigue design based on static crack initiation is more appropriate than the modified Goodman line for higher values of mean stress.

DOI： 10.2320/matertrans.MT-Z2023016

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Elucidation of Fatigue Fracture Mechanism on Glass-Fiber-Reinforced-Plastics 査読

J. Arakawa, M. Sakai, M. Hayashi, H. Akebono, A. Sugeta, J. Ohshita, H. Tanizawa, K. Shimizu, J. Ogawa

Lecture Notes in Mechanical Engineering 213 - 222 2024年

掲載種別：研究論文（国際会議プロシーディングス）

In this study, it was elucidated that the fatigue failure mechanism of glass-fiber reinforced plastics (GFRP) with different fiber orientations, and the relationship between the fiber orientation and the failure mechanism by using a simple unidirectional fiber orientation. Fatigue tests exhibited that GFRP, whose glass fiber oriented parallel to the load direction showed high fatigue strength. Furthermore, as a result of observing the fatigue fracture, in the case of GFRP containing fibers oriented parallel to the loading direction, fatigue cracks occur at the fiber edges, propagated through between the glass fibers and the matrix. After that, the fatigue crack propagation rate gradually decreases, the fatigue crack growth stopped, and finally, GFRP material was statically fractured. Therefore, this suggests that the increase in fiber length of fibers oriented parallel to the loading direction extends the fatigue crack propagation life, leading to an increase in total fatigue life.

DOI： 10.1007/978-981-99-8643-9_24

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Molding and Structure Co-Analysis of Injection Molding Composites Considering Heterogeneity in the Thickness Direction⁺¹ 査読

Chikara Kawamura, Yasuhiro Morita, Mitsugi Fukahori, Masanori Honda, Jinta Arakawa, Hiroyuki Akebono, Atsushi Sugeta

Materials Transactions 65 ( 2 ) 184 - 193 2024年

掲載種別：研究論文（学術雑誌）

During automobile crashes, the main behavior of plastics in the vehicle is bending deformation. Because of this, it is important to accurately calculate the edge stress and allowable stress on structural surfaces. For that purpose, it is necessary to consider the distribution of the fiber orientation angle and degree in the plate thickness direction. In a general coupled analysis for injection-molded materials, a material model is created based on the physical properties obtained from an arbitrary test piece. Therefore, even if the orientation angle in each part to be analyzed is taken into consideration, the degree of orientation is constant in each part, and the degree of orientation distribution in the plate thickness direction is also treated as constant. We tried to improve the accuracy of crash analysis by calculating the edge stress and allowable stress with high accuracy by considering the distribution of orientation angle and degree in the plate thickness direction. For that purpose, we created a model that calculates properties of composite materials from resin and fiber properties, and a process that maps the distribution of orientation angle and degree in the plate thickness direction to each integration point of the shell element in structural molding analysis.

DOI： 10.2320/matertrans.MT-Z2023012

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過大変形を受けたフェライト系ステンレス鋼における最大応力固定条件下での疲労限度線図査読

林美佑, 安藤武史, 權田良平, 北畠啓史, 荒川仁太, 曙紘之, 菅田淳

材料 72 ( 7 ) 535 - 541 2023年7月

Effect of pre-water immersion period on fatigue resistance of adhesive bonded thin steel 査読

Jinta Arakawa, Wataru Jinnouchi, Hiroyuki Akebono, Atsushi Sugeta

Int. J. Fatigue 174 107725 2023年5月

掲載種別：研究論文（学術雑誌）

In this study, two types of adhesive bonded joints whose base materials are JIS SPCC590Y and JIS SUS316, respectively, were examined to determine the fatigue strength and fracture morphology after water immersion. The fatigue strength and cohesive failure rate of the adhesive bonded joints with JIS SPCC590Y adherends significantly decreased, with a similar tendency to that of the static tensile test. However, the fatigue strength of the JIS SUS316-adherend joints decreased slightly, and the cohesive failure rate increased. Oxides, etc., were generated at the bonding interface after long-term use in structures that were adhesively bonded to adherends such as JIS SPCC590Y with poor corrosion resistance, and the bonded interface strength rapidly decreased. By contrast, for the adherends with excellent corrosion resistance, interfacial failure did not occur but cohesive failure did; as a result, both static and fatigue presented high strength.

DOI： 10.1016/j.ijfatigue.2023.107725

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Combined effect of surface morphology and residual stress induced by fine particle and shot peening on the fatigue limit for carburized steels 査読

Shoichi Kikuchi, Kenta Minamizawa, Jinta Arakawa, Hiroyuki Akebono, Shogo Takesue, Mamoru Hayakawa

International Journal of Fatigue 168 107441 2023年3月