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mechanical response

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001143
EISBN: 978-1-62708-229-7
... Abstract The assignment of financial liability for turbine blade failures in steam turbines rests on the ability to determine the damage mechanism or mechanisms responsible for the failure. A discussion is presented outlining various items to look for in a post-turbine blade failure...
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
... to as the viscosity of the fluid material; it may be used as a measure of the resistance of a material to flow. The study of the mechanics of materials and their responses to external forces can typically be treated in one of three manners: solid mechanics response, fluid flow response, or a combination...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006919
EISBN: 978-1-62708-395-9
... Abstract This article reviews the impact response of plastic components and the various methods used to evaluate it.. It describes the effects of loading rate on polymer deformation and the influence of temperature and strain rate on failure mode. It discusses the advantages and limitations...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006789
EISBN: 978-1-62708-295-2
... in-service wear mechanism transitions and/or interactions. The role of tribological parameters on the material response is presented using the wear map concept, which is very useful and informative in several respects. This article also includes some guidelines for the selection of suitable surface...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006818
EISBN: 978-1-62708-329-4
... and die failures are also covered. In addition, the article focuses on a number of factors that are responsible for tool and die failures, including mechanical design, grade selection, steel quality, machining processes, heat treatment operation, and tool and die setup. cold working dies failure...
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
... for determining the causes of crack initiation at the welded joint. Mechanical and Microstructural Characterization As described before, the investigation of the root cause of the structural collapse suggests that the rupture of one of the connections of the RHS member was responsible for the load...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001080
EISBN: 978-1-62708-214-3
... was responsible for the loosening of the nut. It was recommended that the locking mechanism be redesigned and changed in all existing turbines. Locking Nuts (fasteners) Turbine disks Turbine steel (Other, miscellaneous, or unspecified) failure Background A290 mm (10 in.) diam horizontal steam...
Image
Published: 15 May 2022
Fig. 17 Mechanical models and typical behavior. (a) Ideal Hookean solid (σ = E ε; spring model; elastic response). (b) Ideal viscous Newtonian liquid (σ = η ε ̇ ; dashpot model). (c) Maxwell’s mechanical model for a viscoelastic material. (d) Voigt’s mechanical model for a viscoelastic More
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006921
EISBN: 978-1-62708-395-9
... several important steps: Define what constitutes a failure Identify the aging mechanism that is likely to be the long-term material behavior response leading to the failure Collect short-term data under test conditions that most closely resemble the use conditions Utilize temperature...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001797
EISBN: 978-1-62708-241-9
... responses that correspond with the preferred precision of the system’s output motion. The minimization of vibration can solve this problem [ 5 ], but understanding the behavior mechanism when errors occur can also be of a great importance in this field. Profile imperfections are considered as the most...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... Abstract This article commences with a discussion on the characteristics of stress-corrosion cracking (SCC) and describes crack initiation and propagation during SCC. It reviews the various mechanisms of SCC and addresses electrochemical and stress-sorption theories. The article explains...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001151
EISBN: 978-1-62708-219-8
... and truss materials, and mechanical testing of the truss material. It was concluded that substandard structural components in combination with faulty construction was responsible for this service failure. Angle iron Fabrication defects Roofing Trusses Structural steel (Other, miscellaneous...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0090943
EISBN: 978-1-62708-219-8
... and hardness testing, 119x SEM images, and potassium dichromate etched 297x metallographic images) supported the conclusion that the bronze gear cracked via mixed-mode overload, rather than by a progressive mechanism such as fatigue or stress-corrosion cracking. The cracking was not associated with regions...
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...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001604
EISBN: 978-1-62708-234-1
... vapor environment. However, failure analysis showed that cavitation erosion was the responsible failure mechanism, not corrosion as might be expected. Cavitation erosion Hardness Microstructure SO2 316 UNS S31600 1006 UNS G10060 Erosive wear Erosion - corrosion Cavitation wear...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001594
EISBN: 978-1-62708-229-7
... Utilities Electric Company (TU Electric) has implemented in response to these failures. High-cycle fatigue is invisible to proven commercial nondestructive evaluation (NDE) methods during crack initiation and the initial phases of crack growth. Under a constant applied stress, cracks grow at accelerating...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0045988
EISBN: 978-1-62708-235-8
... Abstract During installation, a clamp-strap assembly, specified to be type 410 stainless steel-austenitized at 955 to 1010 deg C (1750 to 1850 deg F), oil quenched, and tempered at 565 deg C (1050 deg F) for 2 h to achieve a hardness of 30 to 35 HRC, and used for securing the caging mechanism...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001680
EISBN: 978-1-62708-221-1
..., fractography, and microhardness testing were used to gain an understanding of the failure mechanism. Wire failures occurred predominantly at characteristic wear sites between strands. These wear sites are identifiable by a large reduction in diameter; however, reduction in area was not responsible...
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
... revealed that the cracks initiated at the outer surface by a combined mechanism of creep and intergranular embrittlement. A smaller grain size resulting from cold bending fabrication procedures for the curved parts was responsible for accelerating the embrittlement. It was recommended that hot bending...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006923
EISBN: 978-1-62708-395-9
... and their response to chemical, physical, and mechanical stresses whether as an unfilled, shaped article or as a component of a composite structure. It summarizes the basic thermal properties of thermoplastics and thermosets, including thermal conductivity, temperature resistance, thermal expansion, specific heat...