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stress-rupture testing

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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
.... It then provides 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610415
EISBN: 978-1-62708-303-4
... stand used for creep and stress-rupture testing. Source: Ref 2 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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490183
EISBN: 978-1-62708-340-9
... life based on dimensional measurements; methods based on metallographic studies; methods based on temperature estimates; and a method for estimating remaining life under creep conditions based on stress-rupture testing of service-exposed material samples. The chapter also discusses the use of fracture...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280211
EISBN: 978-1-62708-267-9
... Results of aluminide coated and uncoated stress rupture tests on Rene 120 nickel-base superalloy using Larson-Miller parameter (P LM ). Note: P LM = T (C + log t ) where C = Larson-Miller constant, T = absolute temperature, t = time in h. For this plot, C = undefined, probably 20, T = °R...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060021
EISBN: 978-1-62708-343-0
.... It then examines a large collection of creep-rupture data corresponding to different alloy designations and heat treatments, identifying key relationships, similarities, and differences. It also presents a test method developed by the authors in which twelve materials are tested over a range of temperature, stress...
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
.... It explains how to deal with time dependent deformation in design, how to estimate cumulative damage under changing conditions, and how to assess the effect of multiaxial stress based on uniaxial test data. It also includes information on rupture ductility, creep fracture, and creep-crack growth...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080379
EISBN: 978-1-62708-304-1
... Source: Ref 31 Results of stress-rupture tests performed at 595 °C (1100 °F) and 276 MPa (40 ksi) on alloy 800H samples obtained from the area near the fracture as well as the material from the same area but was re-solution annealed Table 14.2 Results of stress-rupture tests performed at 595...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060001
EISBN: 978-1-62708-343-0
...-to-rupture recorded. The monotonic results were then compared to failure times of cyclic creep-rupture tests in which alternate tensile and compression stresses were held constant and the specimen was allowed to creep until a fixed strain limit was reached. At that point, the direction of the stress...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630117
EISBN: 978-1-62708-270-9
... in the critical area and three stress levels (S 1 , S 2 , and S 3 ), which are the maximum cyclic tensile stress to which the grains are subjected. Successively higher stresses automatically cause more fatigue origins to form. Fig. 7 Striations generated on a spectrum-loaded test article. Source: Ref 2...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630237
EISBN: 978-1-62708-270-9
..., usually the stress is higher and the time to fracture is less than in a creep condition. For example, creep and stress rupture tests are often performed to evaluate a material’s life expectancy ( Ref 5 ). During a stress rupture test, usually only the nominal stress, temperature, time to fracture...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490415
EISBN: 978-1-62708-340-9
.... 9.9. Larson-Miller stress-rupture plots for vane alloys. A very important property that cannot be overlooked in connection with creep strength is creep ductility. Unfortunately, there is very little creep-ductility data from long-time rupture tests. Decreases in rupture ductility may also...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430409
EISBN: 978-1-62708-253-2
... as designated by stages 1, 2, 3, 4, and 5 corresponds to the expended life fraction equal to undamaged , 0.46, 0.50, 0.84, and 1.0, respectively ( Fig. 8.4 ). The most reliable results on the creep life of any material are obtained by subjecting it to classical long-term stress-rupture tests at stresses...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
... and what they reveal about the load-carrying characteristics of engineering materials. It then discusses the use of failure criteria and the determination of yielding and fracture limits. It goes on to describe the mechanisms and appearances of brittle and ductile fractures and stress rupture, providing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.9781627083409
EISBN: 978-1-62708-340-9
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130043
EISBN: 978-1-62708-284-6
... Fracture Fatigue Quench Cracking Tempered Martensite Embrittlement (TME) Temper Embrittlement Liquid Metal Embrittlement or Solid Metal Embrittlement Hydrogen Embrittlement Stress-Corrosion Cracking Creep Rupture Parts are subject to varying stresses during service...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490383
EISBN: 978-1-62708-340-9
... steel NF616, followed by HCM12M and T91. The data for AMAX 12Cr alloy are not plotted, because the long-time test data needed for establishing code allowable stresses are not available. Based on creep-strength considerations alone, it would appear, therefore, that HCM12M, T91, and NF616 are leading...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060049
EISBN: 978-1-62708-261-7
...: Ref 3.3 Fig. 3.12 Isochronous stress-strain curves for specimens of a material creep tested at a given temperature Fig. 3.11 The three stages of a creep curve Fig. 3.13 Comparative fatigue curves Fig. 3.14 Area under the stress-strain curve as a measure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490265
EISBN: 978-1-62708-340-9
... have to be used instead of smooth-bar rupture data. Because notch-weakening or notch-strengthening behavior is detected only in low-stress (low-strain-rate) tests, very-long-time tests on notched bars will have to be conducted. Extrapolation of short-term data will be nonconservative. The behavior...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490329
EISBN: 978-1-62708-340-9
... of temperature for commonly used Cr-Mo steels, from Section VIII, Division 1 of the ASME Boiler and Pressure Vessel Code. Fig. 7.4. Larson-Miller stress-rupture plot for 2¼Cr-1Mo steel ( Ref 10 ). Fracture Toughness The Charpy V-notch test is the test most commonly used to specify toughness...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540297
EISBN: 978-1-62708-309-6
... testing of polymers is almost nonexistent in the literature. Limited pure mode 2 test data (listed in Table 4.11 ) show that the K 2C to K 1C ratio is 0.89 for PMMA (despite coming from two sources and tested using two different specimen configurations). 7.2.7 Stress Rupture Stress rupture...