Effect of Microstructure on Creep and Creep-Fatigue behavior in Ti-6Al-4V Alloy at Elevated Temperature

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概要

• 論文の詳細を見る

• rights: 本文データは社団法人日本材料学会の許諾に基づきCiNiiから複製したものであるThe effect of microstructure on creep and creep-fatigue behavior at 773K was studied in the Ti-6Al-4V alloy having three different microstructures. The three types of microstructures prepared using different heat treatment conditions included the equiaxed α structure, lenticular α structure and bimodal(composed of equiaxed α and lenticular α)structure. Creep tests were carried out under constant load conditions at 773K in air. Creep-fatigue tests were carried out under total strain controlled conditions using a trapezoidal waveform with hold times of 2min and 10min at 773K in air. Creep rupture strength of the alloy with equiaxed α structure was similar to that of the alloy with lenticular α structure and was higher than that of the alloy with bimodal structure. The number of cycles to failure under creep-fatigue condition of the alloy with lenticular α structure was lower than that of the other two structures. The effect of microstructure on crack propagation life was small as compared with crack initiation life under creep-fatigue conditions. The fracture mode of the alloy with equiaxed α and the bimodal structures was transgranular under creep-fatigue condition. On the other hand, the crack of the alloy with lenticular α structure was initiated and propagated at the interface between the α layer precipitated at the grain boundary and the lenticular α structure.

• 社団法人日本材料学会の論文
• 1998-09-15

著者

• Shiozawa Kazuaki

  Department Of Mechanical And Intellectual Systems Engineering Toyama University

• NISHINO Seiichi

  Department of Mechanical and Intellectual Systems Engineering, University of Toyama

• NISHINO Seiichi

  Faculty of Engineering, Toyama University

• AIKAWA Yasunori

  Graduate School of Engineering, Toyama University

• Nishino S

  Department Of Mechanical And Intellectual Systems Engineering Toyama University

• Nishino Seiichi

  Department Of Mechanical And Intellectual Systems Engineering University Of Toyama

• Aikawa Yasunori

  Graduate School Of Engineering Toyama University

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• Subsurface Crack Initiation and Propagation Mechanism under the Super-Long Fatigue Regime for High Speed Tool Steel (JIS SKH51) by Fracture Surface Topographic Analysis (JSME Medal for Outstanding Paper in 2004)
• The Influence of Applied Stress Ratio on Fatigue Strength of TiN-coated Carbon Steel
• Effect of Microstructure on Creep and Creep-Fatigue behavior in Ti-6Al-4V Alloy at Elevated Temperature
• Corrosion Resistance and Corrosion Fatigue Strength of Carbon Steel Coated with Chromium Nitride by Multistage PVD Method

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