A new parameter for prediction of creep crack growth rate at high temperature

T. Yokobori; H. Sakata; Yokobori Toshimitsu

doi:10.1016/0013-7944(80)90084-3

A new parameter for prediction of creep crack growth rate at high temperature

T. Yokobori, H. Sakata, Yokobori Toshimitsu

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

By analysis based on a series of experimental data obtained by continuous observations using high temperature microscope during the creep test without interruption in vacuum of 10^-5 mm Hg for the purpose of the crack length measurements, a new mathematical equation for prediction of high temperature creep crack growth rate has been proposed in terms of disposable parameters, that is α a_effσ_g,σ_g and temperature for 304 stainless steel within the range of α_g and temperature concerned. It can be seen that it is the best one to fit the experimental data among any other formula proposed hitherto. The new parameter proposed herein 8.48 × 10³ tlog₁₀ α α_effα_g 4.66 × 10² + 5.46log₁₀α_g where α = 1.98 +0.36 a w - 2.12 a w² + 3.42 a w³, a≦0.7w may be used for characterizing the creep crack growth rate just similar as Larson-Miller parameter for the creep life.

Original language	English
Pages (from-to)	533-539
Number of pages	7
Journal	Engineering Fracture Mechanics
Volume	13
Issue number	3
DOIs	https://doi.org/10.1016/0013-7944(80)90084-3
Publication status	Published - 1980

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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title = "A new parameter for prediction of creep crack growth rate at high temperature",

abstract = "By analysis based on a series of experimental data obtained by continuous observations using high temperature microscope during the creep test without interruption in vacuum of 10-5 mm Hg for the purpose of the crack length measurements, a new mathematical equation for prediction of high temperature creep crack growth rate has been proposed in terms of disposable parameters, that is α aeffσg,σg and temperature for 304 stainless steel within the range of αg and temperature concerned. It can be seen that it is the best one to fit the experimental data among any other formula proposed hitherto. The new parameter proposed herein 8.48 × 103 tlog10 α αeffαg 4.66 × 102 + 5.46log10αg where α = 1.98 +0.36 a w - 2.12 a w2 + 3.42 a w3, a≦0.7w may be used for characterizing the creep crack growth rate just similar as Larson-Miller parameter for the creep life.",

author = "T. Yokobori and H. Sakata and Yokobori Toshimitsu",

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T1 - A new parameter for prediction of creep crack growth rate at high temperature

AU - Yokobori, T.

AU - Sakata, H.

AU - Toshimitsu, Yokobori

PY - 1980

Y1 - 1980

N2 - By analysis based on a series of experimental data obtained by continuous observations using high temperature microscope during the creep test without interruption in vacuum of 10-5 mm Hg for the purpose of the crack length measurements, a new mathematical equation for prediction of high temperature creep crack growth rate has been proposed in terms of disposable parameters, that is α aeffσg,σg and temperature for 304 stainless steel within the range of αg and temperature concerned. It can be seen that it is the best one to fit the experimental data among any other formula proposed hitherto. The new parameter proposed herein 8.48 × 103 tlog10 α αeffαg 4.66 × 102 + 5.46log10αg where α = 1.98 +0.36 a w - 2.12 a w2 + 3.42 a w3, a≦0.7w may be used for characterizing the creep crack growth rate just similar as Larson-Miller parameter for the creep life.

AB - By analysis based on a series of experimental data obtained by continuous observations using high temperature microscope during the creep test without interruption in vacuum of 10-5 mm Hg for the purpose of the crack length measurements, a new mathematical equation for prediction of high temperature creep crack growth rate has been proposed in terms of disposable parameters, that is α aeffσg,σg and temperature for 304 stainless steel within the range of αg and temperature concerned. It can be seen that it is the best one to fit the experimental data among any other formula proposed hitherto. The new parameter proposed herein 8.48 × 103 tlog10 α αeffαg 4.66 × 102 + 5.46log10αg where α = 1.98 +0.36 a w - 2.12 a w2 + 3.42 a w3, a≦0.7w may be used for characterizing the creep crack growth rate just similar as Larson-Miller parameter for the creep life.

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