Hiroyuki Miyamoto

Effect of severe plastic deformation on corrosion of Fe–Cr alloys, stainless steels and Cr-containing high-entropy alloys

Hiroyuki Miyamoto

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Abstract 4337128: Myc Induces Higher Cardiomyocyte Cell Cycle Activity and Protects Cardiac Function after Myocardial Infarction in Mice

Aina Hirofuji, Kyohei Oyama, Ryohei Ushioda, Yuki Setogawa et autres

Background: In adults, injured cardiomyocytes (CMs) rarely regenerate after myocardial infarction (MI), due to limited proliferation and cell cycle activity of CMs, impairing cardiac function. Previous studies on mature mice showed (1) endogenous cell cycle activity in 0.01% of CMs and that …

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Explicit Crystal Plasticity Modeling of Texture Evolution in Nonlinear Twist Extrusion

Ülke Şimşek, Hiroyuki Miyamoto, Tuncay Yalçınkaya

The Nonlinear Twist Extrusion (NLTE) method, a novel severe plastic deformation (SPD) technique, aims to enhance grain refinement and achieve a more uniform plastic strain distribution. Grain size and its uniform distribution strongly influence the physical properties of metals. Therefore, predicting texture …

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Early structural valve deterioration of a pulmonary position Inspiris Resilia valve requiring redo pulmonary and tricuspid valve replacement

Akito Inoue, Ryohei Ushioda, Jeong‐Ah Lee, Jun Maruoka et autres

We report a 50-year-old woman with pulmonary and tricuspid valve regurgitation who required redo pulmonary and tricuspid valve replacement (PVR, TVR). At age 8, she underwent right ventricular outflow tract reconstruction for pulmonary stenosis, and at 44 years she had PVR with …

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Successful limb salvage in acute type A aortic dissection with bilateral lower limb malperfusion by early cardiopulmonary bypass reperfusion and total arch replacement with frozen elephant trunk

Daisuke Takeyoshi, Akito Inoue, Jeong‐Ah Lee, Jun Maruoka et autres

We report a case of a 74-year-old man with acute type A aortic dissection (AADA) complicated by bilateral lower limb and renal malperfusion. Due to preoperative motor and sensory deficits, bilateral axillo-bifemoral grafts were used for arterial cannulation to initiate cardiopulmonary bypass …

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Minimally invasive mitral valve replacement for posterior leaflet tear following transcatheter edge-to-edge repair using the MitraClip system: a case report

Ryohei Ushioda, Akito Inoue, Jeong‐Ah Lee, Jun Maruoka et autres

We report a case of an 80-year-old woman with severe mitral regurgitation, low ejection fraction, frailty, and acute decompensated heart failure. Due to her high surgical risk, transcatheter edge-to-edge repair using the MitraClip system (Abbott, Abbott Park, IL, USA) was attempted by …

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Erratum to ’ Severe plastic deformation for producing superfunctional ultrafine-grained and heterostructured materials: An interdisciplinary review’ [J. Alloys Compd. 1002 (2024) 174667]

Kaveh Edalati, Anwar Q. Ahmed, Saeid Akrami, Kei Ameyama et autres

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Introduction to the “Cooperative Process Optimization”

Ken–ichiro Wada, Hiroyuki Miyamoto, T. Sasaki

本稿では，弊社が提供する「連携最適化ソリューション（CPO）」の概要と，板紙プロセスにおける実際の改善事例について紹介する。

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Solidification molding and dispersion strengthening of aluminum chips using ultra-strong shear deformation

Ryosuke TAKAYASU, Hiroyuki Miyamoto, Motohiro YUASA

The purpose of this study is to realize a recycling method for aluminum chips in solidification molding. In this method, aluminum chips are heat treated under different conditions, SPS is applied, and then HPS processing is performed. In this experiment, HPS processing …

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Effect of Grain Refinement on the Pitting Corrosion Resistance of Fe-12Cr Steel

Futoshi WAKI, Hiroyuki Miyamoto, Motohiro YUASA

With industrial advancements, aerospace, energy, and medical fields demand stronger, more durable, and lightweight materials. Ultrafine-grained (UFG) structures, achieved through severe plastic deformation (SPD) techniques like Equal-Channel Angular Pressing (ECAP), enhance mechanical properties and corrosion resistance. However, literature on UFG effects on …

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Revealing What Enhance the Corrosion Resistance beside Grain Size in Ultrafine Grained Materials by Severe Plastic Deformation: Stainless Steels Case

Hiroyuki Miyamoto

Studies have shown that the corrosion resistance of stainless steels in passive environments is enhanced by grain refinement into the order of submicron or nanoscale via various methods, including severe plastic deformation (SPD). This beneficial effect has been attributed to the enhanced …

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Influence of different wrought processes on the microstructure and texture evolution in AZ31 magnesium alloy

Hiromasa YOSHIZUMI, Motohiro Yuasa, Hiroyuki Miyamoto, Hidetoshi Somekawa

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