Cyclic creep acceleration and retardation in Cr-Mo-V rotor steel at ambient and elevated temperature respectively

Zhong-Ghuang Wang, Klaus Rahka, Campbell Laird

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

The cyclic creep properties of Cr‐Mo‐V rotor steel have been explored at room temperature and elevated temperature by multiple‐step tests with increasing maximum stress (R= 0), and with subsequent tests in partial unloading (0 ≤R < 1). Cyclic creep acceleration is observed at room temperature and cyclic creep retardation at elevated temperature. This behavior is explained in terms of cyclic softening at low temperature and by creep‐dominated deformation at high temperature with a ferritic material considered especially prone to retardation because of the high diffusivity of b.c.c. material. Other interesting effects, such as strain burst phenomena and the observation of anomalously high values of the ratio of diametral strain to axial strain, are also reported.

Original languageEnglish
Pages (from-to)219 - 230
Number of pages12
JournalFatigue & Fracture of Engineering Materials & Structures
Volume9
Issue number3
DOIs
Publication statusPublished - 1986
MoE publication typeNot Eligible

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Steel
Creep
Rotors
Temperature
Unloading

Cite this

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title = "Cyclic creep acceleration and retardation in Cr-Mo-V rotor steel at ambient and elevated temperature respectively",
abstract = "The cyclic creep properties of Cr‐Mo‐V rotor steel have been explored at room temperature and elevated temperature by multiple‐step tests with increasing maximum stress (R= 0), and with subsequent tests in partial unloading (0 ≤R < 1). Cyclic creep acceleration is observed at room temperature and cyclic creep retardation at elevated temperature. This behavior is explained in terms of cyclic softening at low temperature and by creep‐dominated deformation at high temperature with a ferritic material considered especially prone to retardation because of the high diffusivity of b.c.c. material. Other interesting effects, such as strain burst phenomena and the observation of anomalously high values of the ratio of diametral strain to axial strain, are also reported.",
author = "Zhong-Ghuang Wang and Klaus Rahka and Campbell Laird",
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doi = "10.1111/j.1460-2695.1986.tb00448.x",
language = "English",
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pages = "219 -- 230",
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Cyclic creep acceleration and retardation in Cr-Mo-V rotor steel at ambient and elevated temperature respectively. / Wang, Zhong-Ghuang; Rahka, Klaus; Laird, Campbell.

In: Fatigue & Fracture of Engineering Materials & Structures, Vol. 9, No. 3, 1986, p. 219 - 230.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Cyclic creep acceleration and retardation in Cr-Mo-V rotor steel at ambient and elevated temperature respectively

AU - Wang, Zhong-Ghuang

AU - Rahka, Klaus

AU - Laird, Campbell

PY - 1986

Y1 - 1986

N2 - The cyclic creep properties of Cr‐Mo‐V rotor steel have been explored at room temperature and elevated temperature by multiple‐step tests with increasing maximum stress (R= 0), and with subsequent tests in partial unloading (0 ≤R < 1). Cyclic creep acceleration is observed at room temperature and cyclic creep retardation at elevated temperature. This behavior is explained in terms of cyclic softening at low temperature and by creep‐dominated deformation at high temperature with a ferritic material considered especially prone to retardation because of the high diffusivity of b.c.c. material. Other interesting effects, such as strain burst phenomena and the observation of anomalously high values of the ratio of diametral strain to axial strain, are also reported.

AB - The cyclic creep properties of Cr‐Mo‐V rotor steel have been explored at room temperature and elevated temperature by multiple‐step tests with increasing maximum stress (R= 0), and with subsequent tests in partial unloading (0 ≤R < 1). Cyclic creep acceleration is observed at room temperature and cyclic creep retardation at elevated temperature. This behavior is explained in terms of cyclic softening at low temperature and by creep‐dominated deformation at high temperature with a ferritic material considered especially prone to retardation because of the high diffusivity of b.c.c. material. Other interesting effects, such as strain burst phenomena and the observation of anomalously high values of the ratio of diametral strain to axial strain, are also reported.

U2 - 10.1111/j.1460-2695.1986.tb00448.x

DO - 10.1111/j.1460-2695.1986.tb00448.x

M3 - Article

VL - 9

SP - 219

EP - 230

JO - Fatigue & Fracture of Engineering Materials & Structures

JF - Fatigue & Fracture of Engineering Materials & Structures

SN - 8756-758X

IS - 3

ER -