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electrical-thermal-mechanical analysis

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001526
EISBN: 978-1-62708-229-7
... Specification SA-335, and the steel was Grade P22, a 2.25Cr-1Mo alloy steel. Visual and metallurgical evaluations showed the cracking in the west superheater outlet header was caused by thermal fatigue. Tube holes had served as a preferential site for thermal fatigue cracking. Electric power generation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c9001686
EISBN: 978-1-62708-220-4
.... The cracking was confined to the inner diameter of the vaporizer coil at positions from 4:00 to 7:00. The cracking was characterized as transgranular and the fracture surface had beach marks. The failure mechanism was thermal fatigue. The heat transfer calculation predicted that dryout of the coil would occur...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001079
EISBN: 978-1-62708-214-3
... ultrasonic indications observed during the inspection. Ring samples were removed as part of the overbore operation to capture flaws, study their cause, and evaluate current mechanical and fracture toughness properties. A detailed finite-element thermal and stress analysis was performed to more...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.9781627081801
EISBN: 978-1-62708-180-1
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
... to the thermal expansion of the specimen at the current temperature is computed through knowledge of the coefficient of thermal expansion, the temperature, and the gage length. It is then transformed into an equivalent electrical signal to which a signal corresponding to the total mechanical strain is added...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003517
EISBN: 978-1-62708-180-1
... and tubing. The article discusses metallurgical instabilities of steel-based alloys and nickel-base superalloys. It provides information on several life assessment methods, namely, the life fraction rule, parameter-based assessments, the thermal-mechanical fatigue, coating evaluations, hardness testing...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0047199
EISBN: 978-1-62708-234-1
... that rolled bar stock should be preferred to extruded bar stock. Differences in grain structure of the forgings, as induced by differences in thermal-mechanical history of the forged material, can have a significant effect on susceptibility to exfoliation corrosion. Regarding thermal treatment, the results...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
...; and preventive maintenance. corrosion corrosion failure analysis corrosion monitoring electrochemical corrosion galvanic protection inhibitors metallic coatings nonmetallic coatings preventive maintenance surface treatments thermal spray CORROSION is the deterioration of a material...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001827
EISBN: 978-1-62708-241-9
... effects of high-temperature oxidation on the hot corrosion process. Preventative measures are also discussed. gas turbine thermal fatigue cracking hot corrosion superalloys corrosion cavities spark optical emission spectrometry operating temperature GTD 111 (cast nickel-base superalloy) FSX...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001125
EISBN: 978-1-62708-214-3
... a rather interesting problem, in addition to a quite simple explanation for failure. There was considerable evidence that thermal effects occurred, because the original drawn pearlite transformed to fine pearlite and some martensite. A likely sequence of events was that, at the moment of rupture...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006756
EISBN: 978-1-62708-295-2
..., a part may have a confirmed damage mode of fatigue. Questions to identify the specific damage mechanism include: Was this high-cycle or low-cycle fatigue? Was the fatigue corrosion assisted? Was there evidence of differential thermal expansion? What cyclic loading is present that could have induced...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001811
EISBN: 978-1-62708-241-9
... coefficient of thermal expansion 28Cr3SiNiWMoV (chromium hot-worked steel) Introduction The increase in temperature increases the thermal vibration pushing the atoms apart, increasing their mean spacing, and causing thermal expansion ( α ). Perhaps the most important physical property of steel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001536
EISBN: 978-1-62708-229-7
... (nuclear grade) stainless steel, which has reduced carbon to prevent sensitization and increased nitrogen to compensate for the loss in strength caused by the carbon reduction. Mechanical or thermal processes can be used to place the inside surface of piping near welds into a state of residual compressive...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003501
EISBN: 978-1-62708-180-1
... requirements (e.g., magnetic, electrical, electronic, or thermal properties) typically supersede the mechanical property requirements. Other design disciplines include industrial, automotive, welding, mining, aerospace, nuclear, and computer engineering. Each type of engineering discipline requires...
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
... and the steam passageways are subjected to high transient thermal stresses during startup and to moderate steady-state mechanical stresses during sustained operation. The metal temperature during steady-state operation is approximately 538 °C (1000 °F), which is in the creep regime; therefore, creep-fatigue...
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
... at temperature. The following life-limiting factors are common to most structures and should be considered in a failure analysis and a life assessment: Material defects Fabrication practices Stress, stress concentration, and stress intensity Temperature Thermal and mechanical fatigue cycles...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001828
EISBN: 978-1-62708-241-9
... at the reactor site, the AECL team of engineers and metallurgists analyzed the root cause of the journal failure. This investigation included: Finite-element stress analysis of the journal to estimate the thermal and mechanical stresses induced (a) due to the shrink fit journal and (b) due to the flow...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003521
EISBN: 978-1-62708-180-1
... a mechanism of LCF. Low-cycle fatigue is induced during thermal loading cycles in gas turbines (each cycle representing unit startup and shutdown). However, metallography of two cracked blades revealed a change in microstructure at as-cast surfaces for depths up to 0.41 mm (0.016 in.) ( Fig. 4 ). Evaluation...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006757
EISBN: 978-1-62708-295-2
... Inherent viscosity, reduced viscosity, intrinsic viscosity Quasi-elastic light scattering (QELS) Macromolecular particle diameter, diffusion coefficient Differential thermal analysis (DTA) Transition temperature, T g ; melt/crystallization temperatures, T m Differential scanning calorimetry...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003522
EISBN: 978-1-62708-180-1
... Inherent viscosity, reduced viscosity, intrinsic viscosity Quasielastic light scattering (QELS) Macromolecular particle diameter, diffusion coefficient Differential thermal analysis (DTA) Transition temperature, T g ; melt/crystallization temperatures, T m Differential scanning calorimetry...