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creep testing

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Published: 01 August 2018
Fig. 14.26 The steel shown in Fig. 14.25 after creep testing at 600 °C (1110 °F) and 118 MPa (17 ksi). Time to rupture was 2179 h. It is possible to follow the microstructure evolution with time, during use under these conditions: recovery, in particular close to the prior austenitic grain More
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Published: 01 December 1989
Fig. 7.30. Creep-test results at 550 °C (1020 °F) for smooth and notched specimens of synthetic HAZ material (peak temperature, 1350 °C, or 2460 °F) in 1¼Cr-½lMo and 2¼Cr-1Mo steel (theoretical stress-concentration factor for notched specimen, 1.9) ( Ref 6 ). More
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Published: 01 July 2009
Fig. 1.8 Typical examples of grain-boundary cracking in creep tests (dark areas are voids at grain boundaries). (a) Evidence of grain-boundary activity in an aluminum specimen after 210 h creep under a stress of 19 MPa (1.4 ton/in. 2 ) at 250 °C (480 °F). Original magnification 150×. Source More
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Published: 01 June 2008
Fig. 15.1 Typical creep test fixture More
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Published: 01 October 2011
Fig. 3.12 Isochronous stress-strain curves for specimens of a material creep tested at a given temperature More
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Published: 01 July 2009
Fig. 1.21 Early concept of cyclic creep-rupture testing (a) Hysteresis loop. (b) Imposed cyclic stress history and cyclic strain response. Source: Ref 1.62 More
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Published: 01 November 2012
Fig. 1 Schematic of a test stand used for creep and stress-rupture testing. Source: Ref 2 More
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Published: 01 August 2005
Fig. 3.42 Schematic hysteresis loops encountered in isothermal creep-fatigue testing. (a) Pure fatigue, no creep. (b) Tensile stress hold, strain limited. (c) Tensile strain hold, stress relaxation. (d) Slow tensile straining rate. (e) Compressive stress hold, strain limited. (f) Compressive More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780185
EISBN: 978-1-62708-281-5
... Abstract This article briefly introduces some commonly used methods of mechanical testing of plastics for determining mechanical properties, also describing the test methods and providing comparative data for the mechanical property tests. In addition, creep testing and dynamic mechanical...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240265
EISBN: 978-1-62708-251-8
... information on the stress-rupture test used to measure the time it takes for a metal to fail at a given stress at elevated temperature. The major classes of creep mechanism, namely Nabarro-Herring creep and Coble creep, are then covered. The chapter also provides information on three primary modes of elevated...
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Published: 01 November 2012
Fig. 2 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 Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610415
EISBN: 978-1-62708-303-4
... Abstract This chapter compares and contrasts the high-temperature behaviors of metals and composites. It describes the use of creep curves and stress-rupture testing along with the underlying mechanisms in creep deformation and elevated-temperature fracture. It also discusses creep-life...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430409
EISBN: 978-1-62708-253-2
... pathways, and relevant test and measurement procedures. It describes life assessment methods based on hardness, wall thickness, scale formation, microstructure, and creep. It also includes a case study on the determination of the residual life of a secondary superheater tube. boiler tubes remaining...
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Published: 01 July 2009
Fig. 5.14 Creep acceleration in interspersion creep-fatigue tests of normalized and tempered 2¼Cr-1Mo steel at 540 °C (1000 °F). (Data courtesy of Ref 5.21 . Source: Ref 5.22 More
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Published: 01 July 2009
Fig. 5.29 Typical features of high creep-rate and low creep-rate CP tests with varying exposure times. AISI type 316 stainless steel at 816 °C (1500 °F), Δε in 2%. (a) High creep-rate test. (b) Low creep-rate test. Source: Ref 5.23 More
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Published: 01 December 1989
Fig. 6.23. Hardness changes in 1Cr-Mo-V rotor forging steel during thermal exposure and creep testing at 450 to 550 °C (840 to 1020 °F) ( Ref 44 ). More
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Published: 01 November 2010
Fig. D.6 The needlelike constituent is eta phase (Ni3Ti); the remainder of the structure is gamma prime in a gamma matrix. Negative-replica electron micrograph, original magnification 15,000×. Condition: Miscellaneous condition(s)—creep tested to rupture at 138 MPa (20 ksi) for 7380 h More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490059
EISBN: 978-1-62708-340-9
..., damage mechanisms, and structural integrity of the test sample. In the sections that follow, it discusses the effects of stress and temperature on creep rate, the difference between diffusional and dislocation creep, and the use of time-temperature-stress parameters for data extrapolation. It explains...
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Published: 01 November 2007
Fig. 5.50 Comparative creep curves of HK-40 tested at 1000 °C (1832 °F) and 15 MPa in air and H 2 -1% CH 4 ( a c = 0.8). Source: Ref 63 More
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Published: 01 November 2007
Fig. 5.51 1% creep strengths of HK-40 and HK-30 tested at 1000 °C (1832 °F) in air, H 2 -1%CH 4 ( a c = 0.8), and for precarburized specimens tested in H 2 -1%CH 4 . Source: Ref 63 More