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creep testing

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Published: 01 June 2019
Fig. 6 Results of the accelerated creep testing. The itme to rupture and the time to 5% additional strain is plotted as a funciton of temperature. More
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Published: 01 June 2019
Fig. 7 Results of the accelerated creep testing. The secondary strain rate is plotted as a function of temperature. More
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006807
EISBN: 978-1-62708-329-4
... creep testing and remaining-life assessment, and pressure vessel time-dependent stress analysis showing the effect of stress relaxation at hot spots. creep curve creep testing elevated-temperature life assessment heater tubes high-temperature components hydrogen attacks remaining-life...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001669
EISBN: 978-1-62708-229-7
... of the header where peak temperatures were believed to have been reached. The long-term mechanical properties of the service-exposed base metal and creep-damaged weld metal were determined by creep testing. Based on the utility's decision to replace the header within one to three years, an isostress...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001738
EISBN: 978-1-62708-220-4
..., the oxidation-cracks stopped. To determine the residual creep life of the sound (non-cracked) bottom manifold material, iso-stress creep tests were performed. It was found that tertiary creep started at 7% strain. The time-to-rupture was greater than 100,000 h. It was concluded that the bottom manifold...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001581
EISBN: 978-1-62708-235-8
...) 495 (72) 304 exposed for three years 58 (8.4) 355 (51) 304 solution annealed 63 (9.1) 298 (43) Note: The yield strength was determined using a modulus of elasticity of 145 GPa (21,000 ksi) at 650 °C (1200 °F). 1 Creep Testing Creep testing was performed at 650 °C (1200 °F...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006928
EISBN: 978-1-62708-395-9
... Abstract This article briefly introduces some commonly used methods for mechanical testing. It describes the test methods and provides comparative data for the mechanical property tests. In addition, creep testing and dynamic mechanical analyses of viscoelastic plastics are also briefly...
Image
Published: 01 January 2002
Fig. 3 Stages of creep deformation. (a) Strain curve for the three stages of creep under constant-load testing (curve A) and constant-stress testing (curve B). (b) Relationship of strain rate, or creep rate, and time during a constant-load creep test. The minimum creep rate is attained during More
Image
Published: 15 January 2021
Fig. 3 Stages of creep deformation. (a) Strain curve for the three stages of creep under constant-load testing (curve A) and constant-stress testing (curve B). (b) Relationship of strain rate, or creep rate, and time during a constant-load creep test. The minimum creep rate is attained during More
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003545
EISBN: 978-1-62708-180-1
... in the third stage of tertiary creep. Constant-stress tests (as opposed to constant-load tests) often do not show tertiary behavior. Fig. 3 Stages of creep deformation. (a) Strain curve for the three stages of creep under constant-load testing (curve A) and constant-stress testing (curve B). (b...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... relationship. These initial experiments by Trouton and Phillips were performed at room temperature. In 1910, Andrade ( Ref 3 ) furthered the study of creep and even studied the effect of temperature, performing a series of tests at 162 °C (323 °F). Andrade’s experiments also revealed the importance of running...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006934
EISBN: 978-1-62708-395-9
... crystallinity, the impact of the temperature on the creep strain is equivalent to the impact of the percentage of the crystallinity on the creep strain in these polymers, at a constant temperature and stress level ( Ref 3 , 4 ). Creep in Polymers Creep and Viscoelasticity Creep tests consist...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006941
EISBN: 978-1-62708-395-9
..., (σ 0 /η)t, on the nearly purely viscous fluid element, and Fig. 5(d) the resultant strain, D(t)*σ 0 , on the viscoelastic material. This generalized description of constant stress is the basis of typical creep testing, in which the compliance modulus function can be empirically measured by testing...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
... evaluations, the creep cavitation damage assessment, the oxide-scale-based life prediction, and high-temperature crack growth methods. coating evaluation creep cavitation damage assessment elevated-temperature failure gas turbine blade hardness testing high-temperature crack growth methods life...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001758
EISBN: 978-1-62708-241-9
... at carbides and other microconstituents, especially in single crystal castings that do not possess grain boundaries. gas turbine engine components creep deformation overheating nickel-base superalloy interdendritic stress-rupture fracture stress-rupture testing stress-rupture life Cast nickel...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006930
EISBN: 978-1-62708-395-9
... are in parallel. This is the appropriate model for experiments where the force or torque is the controlled parameter. The creep test is an example of this, in which a force or torque is applied instantaneously and the deformation is monitored as a function of time. When actual modeling is taking place...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001128
EISBN: 978-1-62708-214-3
... Abstract Creep crack growth and fracture toughness tests were performed using test material machined from a seam welded ASTM A-155-66 class 1 (2.25Cr-1Mo) steel steam pipe that had been in service for 15 years. The fracture morphology was examined using SEM fractography. Dimpled fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001004
EISBN: 978-1-62708-229-7
... . 10.1115/1.3225660 18. Parker J.D. & Bisbee L.H. , “Monitoring in-service changes in Material Properties. “Acceptance Testing and Monitoring of Steam Plant” , I Mech., E. London , Oct . 1991 , paper No. 2 . Selected References Selected References • Creep and Stress...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001475
EISBN: 978-1-62708-234-1
... or for longer time than the adjacent section. It was evident that during the latter part of the service life, extensive creep cracking and oxidation had developed in the region where final disruption was initiated during the pressure test. In this region the cracking had penetrated completely through...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006921
EISBN: 978-1-62708-395-9
..., then the service lifetime can be estimated. The stress rupture data can also be used to rank materials, so the material with the best long-term properties can be selected. Creep and Creep Rupture Testing Polymer materials present challenges in the prediction of lifetime service due to their viscoelastic...