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creep properties

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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
... Property Council (MPC) Omega method ( Ref 28 – 30 ), which can be regarded mathematically as a special case of the Kachanov-Rabotnov model. The Kachanov-Rabotnov model is formulated under the assumption that creep damage results from an effective loss in material cross section due to internal voids...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001687
EISBN: 978-1-62708-220-4
... properties. Grain boundary sliding and dislocation motion were enhanced, causing a local increase in the steady state strain rate and the premature failure of the tube. Grain boundary sliding Plastic deformation Spalling Voids HK UNS J94224 Creep fracture/stress rupture The petrochemical...
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 Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... with available data on creep, stress-rupture, tension, elevated-temperature fatigue, and thermal fatigue properties. Such an analysis is usually sufficient for most failure investigations, but a more thorough analysis can be required when stress, time, temperature, and environment have changed the metallurgical...
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
... The gradual change of the carbide microstructure under prolonged heating may lead to a reduction of creep-strength properties of as much as 25% or more of carbon steel, carbon-molybdenum steel, and certain of the low-alloy chromium-molybdenum steels ( Ref 7 ). The effect of temperature in changing the form...
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
... true in the high pressure (HP) turbine region of the engine where actual metal surface temperatures of the turbine blades (buckets) can exceed 2000 ° F ∼ 0.75 T m , making creep and stress-rupture properties one of the more important variables in the overall life of the blade...
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
...-operating conditions with available data on creep, stress-rupture, tension, elevated-temperature fatigue, and thermal fatigue properties. Such an analysis is usually sufficient for most failure investigations, but a more thorough analysis may be required when stress, time, temperature, and environment have...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0090114
EISBN: 978-1-62708-229-7
... distribution through the thickness of the airfoil. In addition, the local strain at the edge of the hole (crack initiation location) was estimated using Neuber's rule and stress-strain-creep properties of the material. The nominal elastic stress through the blade airfoil thickness was computed using a flat...
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
... forces, mainly over the long term (several years), is of great importance. The mechanisms that govern the creep failure in polymer materials are more complex than those identified for metals and ceramics. This is explained by the viscoelastic properties of plastics, their long and mobile chain...
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...
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
... long it takes to develop, depends on the viscoelastic properties of the plastic. Experimental Analysis Two common ways of evaluating plastics for their viscoelastic character are by means of creep experiments and dynamic mechanical experiments. Results obtained from creep experiments...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0090454
EISBN: 978-1-62708-220-4
... solvent. Investigation (visual inspection, stereomicroscopic examination, 20x/100x SEM images, micro-FTIR in the ATR mode, and analysis using DSC and TGA) supported the conclusion that the chemical storage vessel failed via a creep mechanism associated with the exertion of relatively low stresses...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003550
EISBN: 978-1-62708-180-1
... includes such things as tensile and impact strengths. Long-term properties include creep, stress relaxation, and creep (stress) rupture. Both categories of properties are affected by exposure to external chemical environments. With any polymeric material, chemical exposure may have one or more...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001602
EISBN: 978-1-62708-229-7
.... , and Kubiak J. : Rev. Metal. Madrid (in Spanish), 1999 , 35 ( 1 ), pp. 39 – 46 . 10.3989/revmetalm.1999.v35.i1.604 3. Goward G.W. : Turbomach. Int. , May-June 1985 , pp. 24 – 8 . 4. Galsworthy J.C. : The Effects of Seasalt on the High Temperature Creep Properties...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001280
EISBN: 978-1-62708-215-0
... that the sulfur and phosphorus contents of the weld metal were higher than specified, the thickness was narrower at the weld, and the mechanical resistance of the weld metal was lower than specified. Cracking initiated at the weld root by coalescence of creep cavities. Propagation and expansion was aided...
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
... the beneficial effects that P had on hot ductility properties. Recently Yu and Grabke ( 7 ) observed that the minimum creep rate was increased with P additions. In addition to this effect of P on cavity and carbide formation it was evidenced that P increased the density of Manganese Sulphide non-metallic...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001279
EISBN: 978-1-62708-215-0
... outage. Boiler tubes Graphitization Mechanical properties ASME SA219-T1A UNS K12023 High-temperature corrosion and oxidation Creep fracture/stress rupture Background Applications The superheater tubes were from a utility boiler, a base-loaded unit that had been in service for 13...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001108
EISBN: 978-1-62708-214-3
.... Metals Handbook , 9th ed. , Vol 3 , Properties and Selection: Stainless Steels, Tool Materials and Special Purpose Metals , American Society for Metals , 1980 , p 214 . Selected References Selected References • Creep and Stress Rupture Failures , Failure Analysis and Prevention , Vol...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0048846
EISBN: 978-1-62708-234-1
... were found contain small cracks and microvoids. A mechanism of intergranular creep rupture at elevated temperature was identified as a result of a series of stress-rupture and tensile tests. It was revealed by the crack shape that cracking initiated on the pipe exterior, then propagated inward...
Image
Published: 01 June 2019
Fig. 9 Comparison of stress-rupture properties for service exposed header base material, creep-damaged longitudinal seam-weld metal, and virgin steel tubes at 650 C. More