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Featured researches published by Z.Y. Nan.


Key Engineering Materials | 2010

On Electrochemical Polarization Curve and Corrosion Fatigue Resistance of the AZ31 Magnesium Alloy

Sotomi Ishihara; Z.Y. Nan; Tomonori Namito; Takahito Goshima; Satoshi Sunada

Recently, due to increasing popularity of the magnesium alloys, many studies on corrosion resistance of the magnesium alloys have been reported to improve their corrosion resistance. However, it is not clarified yet whether an electrochemical polarization curve or a corrosion rate is a good measure for the corrosion fatigue resistance or not. In the present study, corrosion fatigue tests, the weight loss test, and measurement of the electrochemical polarization curve were performed in 3% sodium chloride solution using both the extruded and the rolled Mg alloys. It was clarified that there are no differences in the corrosion fatigue lives between the extruded and the rolled Mg alloys, though they have different corrosion resistance. So, it was concluded that the corrosion fatigue characteristic does not correspond well with the trend in corrosion resistance.


Key Engineering Materials | 2007

Effect of Extrusion Ratio on Fatigue Properties of Hot-extruded Magnesium Alloys

Sotomi Ishihara; Hiroshi Shibata; Kenta Komano; Takahito Goshima; Z.Y. Nan

In the present study, fatigue experiments were conducted using two kinds of extruded magnesium alloys with different extrusion ratios. Effect of the extrusion ratio on fatigue lives and crack propagation behavior was studied in detail. There was no dramatic effect of the extrusion ratio on fatigue life, fatigue limit and crack propagation behavior.


Materials Science and Engineering A-structural Materials Properties Microstructure and Processing | 2007

Effect of microstructure on fatigue behavior of AZ31 magnesium alloy

Sotomi Ishihara; Z.Y. Nan; Takahito Goshima


International Journal of Fatigue | 2008

Corrosion fatigue behavior of extruded magnesium alloy AZ31 in sodium chloride solution

Z.Y. Nan; Sotomi Ishihara; Takahito Goshima


Fatigue & Fracture of Engineering Materials & Structures | 2006

Prediction of corrosion fatigue lives of aluminium alloy on the basis of corrosion pit growth law

Sotomi Ishihara; S. Saka; Z.Y. Nan; Takahito Goshima; Satoshi Sunada


Scripta Materialia | 2004

Scanning probe microscope observations of fatigue process in magnesium alloy AZ31 near the fatigue limit

Z.Y. Nan; Sotomi Ishihara; Takahito Goshima; R. Nakanishi


Scripta Materialia | 2007

On the sharp bend of the S–N curve and the crack propagation behavior of extruded magnesium alloy

Z.Y. Nan; Sotomi Ishihara; A.J. McEvily; Hiroshi Shibata; Kenta Komano


Surface & Coatings Technology | 2008

Effect of electroless-Ni-plating on corrosion fatigue behavior of magnesium alloy

Sotomi Ishihara; H. Notoya; A. Okada; Z.Y. Nan; Takahito Goshima


International Journal of Fatigue | 2008

ON THE INITIATION AND GROWTH BEHAVIOR OF CORROSION PITS DURING CORROSION FATIGUE PROCESS OF INDUSTRIAL PURE ALUMINUM

Sotomi Ishihara; Z.Y. Nan; A.J. McEvily; Takahito Goshima; Satoshi Sunada


Transactions of the Japan Society of Mechanical Engineers. A | 2004

Fatigue Behavior of AZ31 Extruded Magnesium Alloy in Laboratory Air

Z.Y. Nan; Sotomi Ishihara; Takahito Goshima; Reiko Nakanishi

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Takahito Goshima

Tokyo Institute of Technology

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Hiroshi Shibata

Toyama National College of Maritime Technology

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A.J. McEvily

University of Connecticut

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S. Saka

University of Toyama

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