Cyclic stress and diametral strain response during high strain amplitude fatigue of a 1Cr-1.3Mo-0.3V bainitic rotor steel at elevated temperature

Part II

Klaus Rahka, Campbell Laird

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Tests of a Cr-Mo-V rotor steel have been carried out at 550°C using continuous cycling and cycling with tensile dwells. A special feature of these tests was that they were carried out in control by the axial total strain but that diametral strain was simultaneously measured. Comparison of the diametral and axial strain ranges showed that “Poisson's ratio” initially increased but subsequently declined steadily with accumulating cycles. While these results do not challenge the traditional view of Poisson's ratio which is defined for homogeneous material, they indicate that numerical values of the ratio must be used with caution. The results on diametral strain response are carefully analyzed and defended as a true material response; they indicate that the ratio of diametral to axial strain is sensitive to the accumulated fatigue damage of the specimen in a rather unpredictable fashion.

Original languageEnglish
Pages (from-to)277 - 291
Number of pages15
JournalJournal of Testing and Evaluation
Volume14
Issue number6
DOIs
Publication statusPublished - 1986
MoE publication typeNot Eligible

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Steel
Rotors
Fatigue of materials
Poisson ratio
Temperature
Fatigue damage

Cite this

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title = "Cyclic stress and diametral strain response during high strain amplitude fatigue of a 1Cr-1.3Mo-0.3V bainitic rotor steel at elevated temperature: Part II",
abstract = "Tests of a Cr-Mo-V rotor steel have been carried out at 550°C using continuous cycling and cycling with tensile dwells. A special feature of these tests was that they were carried out in control by the axial total strain but that diametral strain was simultaneously measured. Comparison of the diametral and axial strain ranges showed that “Poisson's ratio” initially increased but subsequently declined steadily with accumulating cycles. While these results do not challenge the traditional view of Poisson's ratio which is defined for homogeneous material, they indicate that numerical values of the ratio must be used with caution. The results on diametral strain response are carefully analyzed and defended as a true material response; they indicate that the ratio of diametral to axial strain is sensitive to the accumulated fatigue damage of the specimen in a rather unpredictable fashion.",
author = "Klaus Rahka and Campbell Laird",
year = "1986",
doi = "10.1520/JTE10344J",
language = "English",
volume = "14",
pages = "277 -- 291",
journal = "Journal of Testing and Evaluation",
issn = "0090-3973",
publisher = "American Society for Testing and Materials ASTM",
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}

Cyclic stress and diametral strain response during high strain amplitude fatigue of a 1Cr-1.3Mo-0.3V bainitic rotor steel at elevated temperature : Part II. / Rahka, Klaus; Laird, Campbell.

In: Journal of Testing and Evaluation, Vol. 14, No. 6, 1986, p. 277 - 291.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Cyclic stress and diametral strain response during high strain amplitude fatigue of a 1Cr-1.3Mo-0.3V bainitic rotor steel at elevated temperature

T2 - Part II

AU - Rahka, Klaus

AU - Laird, Campbell

PY - 1986

Y1 - 1986

N2 - Tests of a Cr-Mo-V rotor steel have been carried out at 550°C using continuous cycling and cycling with tensile dwells. A special feature of these tests was that they were carried out in control by the axial total strain but that diametral strain was simultaneously measured. Comparison of the diametral and axial strain ranges showed that “Poisson's ratio” initially increased but subsequently declined steadily with accumulating cycles. While these results do not challenge the traditional view of Poisson's ratio which is defined for homogeneous material, they indicate that numerical values of the ratio must be used with caution. The results on diametral strain response are carefully analyzed and defended as a true material response; they indicate that the ratio of diametral to axial strain is sensitive to the accumulated fatigue damage of the specimen in a rather unpredictable fashion.

AB - Tests of a Cr-Mo-V rotor steel have been carried out at 550°C using continuous cycling and cycling with tensile dwells. A special feature of these tests was that they were carried out in control by the axial total strain but that diametral strain was simultaneously measured. Comparison of the diametral and axial strain ranges showed that “Poisson's ratio” initially increased but subsequently declined steadily with accumulating cycles. While these results do not challenge the traditional view of Poisson's ratio which is defined for homogeneous material, they indicate that numerical values of the ratio must be used with caution. The results on diametral strain response are carefully analyzed and defended as a true material response; they indicate that the ratio of diametral to axial strain is sensitive to the accumulated fatigue damage of the specimen in a rather unpredictable fashion.

U2 - 10.1520/JTE10344J

DO - 10.1520/JTE10344J

M3 - Article

VL - 14

SP - 277

EP - 291

JO - Journal of Testing and Evaluation

JF - Journal of Testing and Evaluation

SN - 0090-3973

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ER -