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microstructure modeling

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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
... of loading: in-phase and out-of-phase cycling. The article illustrates the ways in which damage can interact at high and low temperatures and the development of microstructurally based models in parametric form. It presents a case study of the prediction of residual life in a turbine casing of a ship through...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001816
EISBN: 978-1-62708-241-9
... of the creep tension stress and the strain rate suffered by the polycrystalline arrangement [ 1 ]. Two mechanisms are considered to take place in the material: grain boundary migration and grain boundary shearing/sliding. Theoretic and microstructural models agree that the most important feature...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... to approximately 75% of the shear modulus. This requires between 100 and 1000 dislocations, a not unreasonable number in either bulk material or in second phases in a two-phase microstructure. Fig. 3 Dislocation models for cleavage fracture. (a) Elastic crack regarded as a pileup of edge dislocations. (b...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001817
EISBN: 978-1-62708-241-9
... of intermediate improper microstructures [ 2 ]. In addition to the financial losses, failure of wire ropes may cause catastrophic events. During the past few decades, many researchers have studied the modeling and failure of wire ropes. Parameswaran et al. [ 3 ] investigated the failure of the outer z-shaped...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
... led an investigation that included fractographic and microstructural analysis, hardness testing, inductively coupled plasma spectroscopy, and finite-element analysis. The fracture was shown to be brittle in nature and covered with oxide flakes, but no other flaws relevant to the failure were observed...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001760
EISBN: 978-1-62708-241-9
... Observation Results Measurements Material Investigation Finite Element Modeling Conclusion Acknowledgments References References 1. Aluminium and Aluminium Alloys - Castings - Chemical Composition and Mechanical Properties , Standard No. DIN-EN-1706( 1998 ) 2. AlSi9Cu3 Aluminum...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001308
EISBN: 978-1-62708-215-0
... Fig. 1 Wind tunnel model orientation adjustment system, showing model support, test section floor, supporting carriages, and turntable rail Fig. 2 Turntable rail, showing type and location of cracking Fig. 4 SEM micrograph of region Ia. Rock candy appearance indicates...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001786
EISBN: 978-1-62708-241-9
.... , A new model for hydrogen-assisted cracking (hydrogen “embrittlement”) . Metall. Trans. 3 , 437–451 ( 1972 ) 10.1007/BF02642048 7. Pilkey W.D. , Peterson’s Stress Concentration Factors , 2nd edn. ( Wiley , New York , 1997 ) 10.1002/9780470172674 8. Talukdar P. , Sen...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001777
EISBN: 978-1-62708-241-9
...) identification of the main regions of the structure directly affected by the initiation of the collapse; (c) sampling of key parts for evaluation through mechanical tests (hardness, tensile, and Charpy tests), fractography, and microstructural characterization; (d) structural analysis using computational models...
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
... damage mechanisms and elucidate mechanism coupling interactions. In addition, life modeling in TMF conditions and a practical application of TMF life prediction are presented. coupling interactions fatigue life prediction thermomechanical fatigue THERMOMECHANICAL FATIGUE (TMF) is the general...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001852
EISBN: 978-1-62708-241-9
.... With the help of finite element modeling, they analyzed the material as well as the design and in-service application of the mold. They discovered that overconstraining the mold, while it was in service, caused excessive thermal stresses which accelerated crack initiation and propagation. Investigators also...
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
... by second phases in microstructure (see Fig. 51 ) Grooves or flutes SCC TGF Artifacts (mud cracks) Dried liquid on surface. May indicate incomplete cleaning of surface. If in the as-received condition, may indicate fluids from service and may indicate SCC conditions. Material should...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001839
EISBN: 978-1-62708-241-9
... to routine inspection and testing before dispatching the lot to the customer’s and as such, revealed no abnormalities with respect to the microstructure and mechanical properties, what so ever. However, a pronounced loss of tensile ductility was observed in steel samples, which were sent back by the customer...
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
... the dynamics of a fracture event (quasi-static versus dynamic/impact loading) In this article, the basic types of fracture processes (ductile, brittle, fatigue, and creep) are described briefly, principally in terms of fracture appearances (as sometimes affected by the microstructure). More in-depth...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
... – 545 10.1080/10402004.2014.881582 45. Alley E.S. and Neu R.W. , Microstructure-Sensitive Modeling of Rolling Contact Fatigue , Papers from the 2009 TMS Annual Meeting Symposium on Mechanisms, Theory, Experiments and Industrial Practice in Fatigue , Vol 32 ( No. 5 ), 2010 , p...
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
... processing and controls and have redefined the criteria for failure. Furthermore, the pursuit of understanding how and why these failures occurred have resulted in the development of structural-integrity programs, enhanced analytical modeling and prediction techniques, accurate life assessment methods...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.9781627082952
EISBN: 978-1-62708-295-2
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001021
EISBN: 978-1-62708-214-3
... Scanning Electron Microscopy/Fractography Microstructural Analysis Crack Origins/Paths Chemical analysis of the material showed that it conformed to the specification for AU4SG. Simulation Specimens Calibration of Crack Growth Model Eddy current examination of the bolt hole revealed...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001850
EISBN: 978-1-62708-241-9
... inspection, chemical analysis, microstructural characterization, and mechanical property testing. The pipe was made from nonresulfurized carbon steel as specified and was lined with an alumina refractory. Visual inspection revealed cracks in the refractory lining, which corresponded with the location...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... is nucleated when the shear stress concentrated by the pileup becomes equal to approximately 75% of the shear modulus. This requires between 100 and 1000 dislocations, a not unreasonable number in either bulk material or in second phases in a two-phase microstructure. Fig. 3 Dislocation models...