Creep life prediction of small punch creep testing specimens for service-exposed Cr5Mo using the theta-projection method

Yangyan Zheng; Sisheng Yang; Xiang Ling

doi:10.1016/j.engfailanal.2016.11.009

Creep life prediction of small punch creep testing specimens for service-exposed Cr5Mo using the theta-projection method

Yangyan Zheng, Sisheng Yang, Xiang Ling

School of Mechanical and Power Engineering

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

19 Scopus citations

Abstract

In this paper, small punch creep tests under different loads and conventional creep tests with various stresses at 550 °C were conducted on service-exposed Cr5Mo material. The theta-projection and modified theta-projection methods were used to analyze the creep curve and the minimum creep rate. The actual fracture time in the small punch creep test was 377 h, and the theta-projection method predicted a time of 339 h, which represents an error of 10.08%. The predicted time from the modified theta-projection method was 316.25 h, which represents an error of 16.11%. The curves predicted by the two models are similar. The theta-projection method is suitable for applications in small punch creep life analysis.

Original language	English
Pages (from-to)	58-66
Number of pages	9
Journal	Engineering Failure Analysis
Volume	72
DOIs	https://doi.org/10.1016/j.engfailanal.2016.11.009
State	Published - 1 Feb 2017

Keywords

Creep life
Small punch creep test
Theta-projection

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10.1016/j.engfailanal.2016.11.009

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title = "Creep life prediction of small punch creep testing specimens for service-exposed Cr5Mo using the theta-projection method",

abstract = "In this paper, small punch creep tests under different loads and conventional creep tests with various stresses at 550 °C were conducted on service-exposed Cr5Mo material. The theta-projection and modified theta-projection methods were used to analyze the creep curve and the minimum creep rate. The actual fracture time in the small punch creep test was 377 h, and the theta-projection method predicted a time of 339 h, which represents an error of 10.08%. The predicted time from the modified theta-projection method was 316.25 h, which represents an error of 16.11%. The curves predicted by the two models are similar. The theta-projection method is suitable for applications in small punch creep life analysis.",

keywords = "Creep life, Small punch creep test, Theta-projection",

author = "Yangyan Zheng and Sisheng Yang and Xiang Ling",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd",

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T1 - Creep life prediction of small punch creep testing specimens for service-exposed Cr5Mo using the theta-projection method

AU - Zheng, Yangyan

AU - Yang, Sisheng

AU - Ling, Xiang

PY - 2017/2/1

Y1 - 2017/2/1

N2 - In this paper, small punch creep tests under different loads and conventional creep tests with various stresses at 550 °C were conducted on service-exposed Cr5Mo material. The theta-projection and modified theta-projection methods were used to analyze the creep curve and the minimum creep rate. The actual fracture time in the small punch creep test was 377 h, and the theta-projection method predicted a time of 339 h, which represents an error of 10.08%. The predicted time from the modified theta-projection method was 316.25 h, which represents an error of 16.11%. The curves predicted by the two models are similar. The theta-projection method is suitable for applications in small punch creep life analysis.

AB - In this paper, small punch creep tests under different loads and conventional creep tests with various stresses at 550 °C were conducted on service-exposed Cr5Mo material. The theta-projection and modified theta-projection methods were used to analyze the creep curve and the minimum creep rate. The actual fracture time in the small punch creep test was 377 h, and the theta-projection method predicted a time of 339 h, which represents an error of 10.08%. The predicted time from the modified theta-projection method was 316.25 h, which represents an error of 16.11%. The curves predicted by the two models are similar. The theta-projection method is suitable for applications in small punch creep life analysis.

KW - Creep life

KW - Small punch creep test

KW - Theta-projection

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DO - 10.1016/j.engfailanal.2016.11.009

M3 - 文章

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SN - 1350-6307

VL - 72

SP - 58

EP - 66

JO - Engineering Failure Analysis

JF - Engineering Failure Analysis

ER -

Creep life prediction of small punch creep testing specimens for service-exposed Cr5Mo using the theta-projection method

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Keywords

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