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subcritical crack growth

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001789
EISBN: 978-1-62708-241-9
... growth rate is two to three times higher in Ni-Al bronze. Based on the results of this work, the likelihood of subcritical cracking under various conditions can be reasonably estimated, which, in the case at hand, proved to be quite high. union nut corrosion ammonia installation torque bronze...
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006790
EISBN: 978-1-62708-295-2
... Abstract Engineered components fail predominantly in four major ways: fracture, corrosion, wear, and undesirable deformation (i.e., distortion). Typical fracture mechanisms feature rapid crack growth by ductile or brittle cracking; more progressive (subcritical) forms involve crack growth...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003554
EISBN: 978-1-62708-180-1
... with no observable change in the flow characteristics of the structural metal, as subcritical crack growth or as delayed failure under static load. For any given combination of structural metal and embrittling metal, there exist temperatures below and above which there is no embrittlement. The low-temperature...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006786
EISBN: 978-1-62708-295-2
..., are now termed solid-metal-induced embrittlement (SMIE). In either case, the metal-induced embrittlement is the result of subcritical crack growth in the structural metal, when it is stressed in tension in the presence of a specific lower-melting-point metal or alloy. Metal-induced embrittlement has...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001140
EISBN: 978-1-62708-227-3
... cracking may occur in service. The analysis of some recent catastrophic failures of high pressure cylinders which were due to subcritical crack growth prompted a study of subcritical cracking in aluminum alloys used in cylinder fabrication and demonstrated the need for a critical review of the criterion...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001035
EISBN: 978-1-62708-214-3
... conditions. The nominal loads that the core would have been subjected to would have increased slowly in magnitude as the subcritical crack growth occurred, until it reached the critical value for failure (when the fatigue crack had grown to the point that the remaining cross section could no longer withstand...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003512
EISBN: 978-1-62708-180-1
... investigating a design and doing a life assessment. Stress intensity is the controlling factor in subcritical crack growth propagation rates and the identification of the critical crack size for the onset of rapid overload (critical fracture). Stress and crack geometry are parameters that determine...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003530
EISBN: 978-1-62708-180-1
... of fracture mechanics. The fracture mechanics approach is an important part of stress analysis at the tips of sharp cracks or discontinuities. The article reviews fracture mechanics concepts, including linear elastic fracture mechanics, elastic-plastic fracture mechanics, and subcritical fracture mechanics...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... elastic fracture mechanics analysis, with some mention of elastic-plastic fracture mechanics analysis. The article describes the probabilistic aspects of fatigue and fracture. Information on crack-growth simulation of the material is also provided. crack-growth simulation elastic-plastic fracture...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... section through a cracked region in a similar part showing brittle fracture in the carbides and plastic deformation of the surrounding matrix. Vilella's reagent. 297× Overload fracture by ductile or brittle crack growth is often the final result of fracture following other subcritical cracking...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001670
EISBN: 978-1-62708-217-4
... on the Fracture Toughness and Subcritical Crack Growth Characteristics of a 350-Grade Maraging Steel ,” Met. Trans. , Vol. 1 , pp. 1551 – 1559 ( June 1970 ). 10.1007/BF02642000 4. Telephone Communication with Mr. Thomas Martin, MICOM, 28 October 1981 . Selected Reference Selected Reference...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001026
EISBN: 978-1-62708-214-3
... growth was cleavage, probably caused by cast-in hydrogen. The intergranular appearance resulted from heat treatment of the already cracked part, which caused the formation of grain-boundary “growth figures” on the exposed crack surfaces. It was recommended that the castings be more closely inspected...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
.... , “Interim Report on the Continuous Cycling Elevated Temperature Fatigue and Subcritical Crack Growth Behavior of 2.25 Cr-1 Mo Steel,” ORNL-TM-4993, Oak Ridge National Laboratory , Oak Ridge, TN , 1975 In thermomechanical fatigue, the path is defined by plotting the mechanical strain (i.e...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003544
EISBN: 978-1-62708-180-1
... mechanics. The crack-tip stress-intensity factor, K , uniquely characterizes the elastic stress field near a crack and represents the crack driving force that controls the onset of brittle fracture and the rate of subcritical crack growth in structures. Its magnitude depends on the applied nominal stress...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... in large grain size Fracture surface roughness Increase in surface roughness in direction of crack growth (may be affected in bending by compressive stressed region when crack moves into this region) Smooth region plus rough region in direction of growth—cyclic loading Rough matte fractures...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003564
EISBN: 978-1-62708-180-1
.... , and Keer L.M. , Line Contact between a Rigid Indenter and a Damaged Elastic Body , Q. J. Mech. Appl. Math. , Vol 37 , 1984 , p 468 – 478 10.1093/qjmam/37.3.467 25. Miller G.R. , Keer L.M. , and Cheng H.S. , On the Mechanics of Fatigue Crack-Growth due to Contact Loading...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... Growth Behavior of Alloy 718 at 298 K and 823 K , Metall. Trans. A , Vol 9 ( No. 4 ), April 1978 , p 471 – 480 10.1007/BF02646402 29. Gerberich W.W. and Jatavallabhula K. , Quantitative Fractography and Dislocation Interpretations of the Cyclic Cleavage Crack Growth Process...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... in Table 1 , which includes concise summaries of contributing factors and the visual and microscopic aspects of each. In general, the growth or propagation of cracks during an overload fracture is more rapid than for the more progressive forms of cracking due to fatigue or creep. Hence, overload...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
.... , Corwin W.R. , Frazier J.L. , and Leitnaker J.M. , “ Interim Report on the Continuous Cycling Elevated Temperature Fatigue and Subcritical Crack Growth Behavior of 2.25 Cr-1 Mo Steel ,” ORNL-TM-4993, Oak Ridge National Laboratory , Oak Ridge, TN , 1975 Performing laboratory...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003552
EISBN: 978-1-62708-180-1
... microscopic cracks have not yet initiated. Hydrogen stress cracking is characterized by the brittle fracture of an alloy due to hydrogen exposure from either some time prior to manufacturing or from environmental hydrogen. It is also commonly considered a subcritical crack growth mechanism that often...