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thermal conductivity

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0046972
EISBN: 978-1-62708-217-4
... included application of a protective coating to the blades, provided the coating was sufficiently ductile to avoid cracking during operation to prevent surface oxidation. Such a coating would also alleviate thermal differentials, provided the thermal conductivity of the coating exceeded that of the base...
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
...Thermal properties of selected resins Table 1 Thermal properties of selected resins Thermoplastic resins Heat-deflection temperature at 1.82 MPa (0.264 ksi) UL index (a) Thermal conductivity Coefficient of thermal expansion, 10 −6 /°C °C °F °C °F W/m · K Btu/ft · h · °F...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001031
EISBN: 978-1-62708-214-3
... and reduced its thermal conductivity, which resulted in a higher hot-gas wall temperature and associated degradation of mechanical properties. References References 1. Sanders J.H. and Chen P.S. , “Microstructure Evaluation of Undoped and Oxygen Doped NARloy-Z at High temperatures...
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
... of steel to be considered in design is its coefficient of thermal expansion. Most heat-treating problems could be solved if this coefficient could be controlled [ 1 ]. Almost all solids expand on heating and contract upon cooling. The relationship between thermal conductivity and thermal expansion...
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
... Nickel properties used in FE analysis [<xref rid="c9001852-ref10" ref-type="bibr">10</xref>] Table 4 Nickel properties used in FE analysis [ 10 ] Density 8900 kg/m 3 Module of elasticity 170 GPa Poisson’s ratio 0.31 Thermal expansion 14 E-6/°C Thermal conductivity 90.7 J/m °C...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006869
EISBN: 978-1-62708-395-9
.... , He L. , and Bai Y. , Fabrication and Characterization of Aluminum Nitride Polymer Matrix Composites With High Thermal Conductivity and Low Dielectric Constant for Electronic Packaging , Materials Science and Engineering: B , Vol 177 (No. 11 ), 2012 , p 892 – 896 10.1016/j.mseb...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006871
EISBN: 978-1-62708-395-9
... on the thermal conductivity of the samples ( Fig. 9 ). In some cases, temperature differences of more than 15 K have been measured between coated metal and plastic samples of the same color ( Ref 29 ). In addition to UV, visible, and IR radiation, xenon arc lamps also emit a great deal of heat. The lamps...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001110
EISBN: 978-1-62708-214-3
... revealed that failure was by thermal fatigue caused by the presence of biaxial thermal stresses on the inner surface of the tube. Because of their higher coefficient of thermal expansion and their lower thermal conductivity, austenitic stainless steels have poor resistance to thermal fatigue...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001349
EISBN: 978-1-62708-215-0
... of their higher thermal expansion and lower thermal conductivity compared with carbon steel. In the case of a similar tank in another plant, one of the critical circumferential joints was eliminated, thus contributing to its successful operation ( Fig. 6 ). To alleviate the problem of new cracks occurring...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001848
EISBN: 978-1-62708-241-9
... as explained above) damages the microstructural boundaries ahead of the crack tip. Thermo-physical properties of die materials have a great impact on the temperature gradients across the die, which in turn, dictate the magnitude of thermal stresses. High heat capacity and heat conductivity do help...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006932
EISBN: 978-1-62708-395-9
...Linear coefficients of thermal expansion (CTEs) Table 1 Linear coefficients of thermal expansion (CTEs) Material 10 −6 /K Polymethyl methacrylate(a) 50–90 Polyacrylonitrile(a) 66 Cellulose acetate(a) 100–150 Nylon 6(a) 80–83 Nylon 11(a) 100 Polycarbonate...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006925
EISBN: 978-1-62708-395-9
...) Up to 5000 (725) Up to 350 (50) Young’s modulus, GPa (10 6 psi) 15–400 (2–58) 150–450 (22–65) 0.001–10 (0.00015–1.45) High-temperature creep resistance Poor to medium Excellent … Thermal expansion Medium to high Low to medium Very high Thermal conductivity Medium to high...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001816
EISBN: 978-1-62708-180-1
... tubes are not chosen for thermal conductivity but for strength, especially creep or stress-rupture strength. Therefore, the temperature gradient through the steel is not controlled by design but accepted as a consequence of material selection. Third, at the fluid interface with the inside-diameter...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006827
EISBN: 978-1-62708-329-4
... between metal workpieces. For electronic manufacturing, solder alloys with lead or copper are commonly used; they have a relatively low melting point (~180 to 220 °C, or 355 to 430 °F), good mechanical properties for impact and fatigue resistance, and decent thermal and electrical conductivity ( Ref 1...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006825
EISBN: 978-1-62708-329-4
... through the steel boiler tubes transfers heat to the internal fluid. Although conduction is important, boiler tubes are not chosen for thermal conductivity but for strength, especially creep or stress-rupture strength. Therefore, the temperature gradient through the steel is not controlled by design...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001737
EISBN: 978-1-62708-229-7
... of the gas turbine casing illustrates the need to review the state of the material of a component carefully, including the conducting of a sufficiently complete metallographic examination. Although thermal fatigue cracks growing at high temperature can progress by creep mechanisms at their tips...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001571
EISBN: 978-1-62708-229-7
..., rather than the base metal. As the cladding was in direct contact with the molten core material, it is heated before the A533GrB plate material. Furthermore, because the thermal conductivity of an austenitic stainless steel, like the ER308L cladding, is considerably lower than that of a low alloy steel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001593
EISBN: 978-1-62708-234-1
... Abstract A failure analysis was conducted on a flow-sensing device that had cracked while in service. The polysulfone sensor body cracked radially, adjacent to a molded-in steel insert. This article describes the investigative methods used to conduct the failure analysis. The techniques...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001129
EISBN: 978-1-62708-214-3
...) and brittle compared with the core hardness of 20 HRC. The martensite formed when the area adjacent to the weld metal was heated above the transformation temperature and was “self-quenched” via thermal conduction by the mass of the casting. Unwanted martensite is considered detrimental and represents improper...
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
... or not they are significant. X-ray Based on the results from the hardness and microstructure investigation and the content of Reference 4 , it was felt that the inner wall softening was definitely due to a thermal affect. Due to the time limitations it was only possible to conduct a limited X-ray analysis...