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high-temperature dynamic recovery test

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Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006676
EISBN: 978-1-62708-213-6
... involved in preparation of test specimen for DMA measurements. Some factors to be considered when calibrating the DMA instrument are provided, along with a description on processes for interpreting the temperature and frequency dependence of DMA curves as well as the applications of DMA. dynamic...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005403
EISBN: 978-1-62708-196-2
...), produced by equal channel angular extrusion (ECAE) ( Ref 3 ), high pressure torsion (HPT) ( Ref 4 ), or merely large strain torsion testing ( Ref 5 ). Ultrafine grain strucutres can be obtained in this way. When dynamic recovery is weak, local concentrations of dislocations lead to various types of...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003816
EISBN: 978-1-62708-183-2
.... Silicon bronzes are susceptible to embrittlement by high-pressure steam and should be tested for suitability in the service environment before being specified for components to be used at elevated temperature. These alloys, containing 5 to 12% Al, have excellent resistance to impingement corrosion...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0003995
EISBN: 978-1-62708-185-6
... schedules. The article describes the metallurgical processes in grain refinement of austenite steel by hot working, such as recovery and recrystallization and strain-induced transformation. The grain refinement in high strength low alloy steel by alloy addition is also discussed. The article provides an...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003024
EISBN: 978-1-62708-200-6
.... When both mechanisms occur, the slope will be between 0 and 1. Typical volumetric strain versus tensile strain data for high-impact polystyrene (HIPS) and toughened polyvinyl chloride (PVC) tested in creep are shown in Fig. 3 . In PVC, the slope is slightly positive, but much less than 1. In this...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005957
EISBN: 978-1-62708-166-5
... the high exit velocity of combusting gas from the combusting tunnel vent (80 to 120 m · s −1 ), where the homogeneous medium is dynamically affected. The schematic in Fig. 33 shows a pulse burner with adapting pipe made of recrystallized silicon carbide. Common air preheat temperatures are 300 to...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001243
EISBN: 978-1-62708-170-2
... too high, with barium carbonate. Temperature too high Current density too low Passive or scaled anodes. Correct by cleaning and reactivating anodes, using high current density until uniform gassing is obtained, and checking for good anode contact. Rack contacts too heavily built up with...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003052
EISBN: 978-1-62708-200-6
... the silica lattice in the glaze. They are formulated to develop the desired maturing temperature and properties of the glaze, such as thermal expansion and hardness. Decoration and color systems must be chemically and physically compatible with the substrate and the glaze during high-temperature...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009009
EISBN: 978-1-62708-185-6
... carried out in a servohydraulic machine such as that shown schematically in Fig. 1 . Because strain-rate effects are large in high-temperature testing, it is important to use an apparatus with high machine stiffness. The furnace that surrounds the specimen is usually of resistance, radiant-heating, or...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... of the workpiece material (sticking friction). Control of friction through lubrication is an important aspect of metalworking. High friction leads to various defects that limit workability. However, for most workability tests, conditions are selected under which friction is either absent or easily...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009010
EISBN: 978-1-62708-185-6
... ( Ref 5 ) has been used since the 1950s to investigate the hot-tension behavior of materials and thus to generate important information for the selection of hot-working parameters. A Gleeble unit is a high-strain-rate, high-temperature testing machine where a solid, buttonhead specimen is held...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003063
EISBN: 978-1-62708-200-6
... Abstract Ceramic-matrix composites (CMCs) are being developed for a number of high-temperature and high-performance applications in industrial, aerospace, and energy conservation sectors. This article focuses on processing, fabrication, testing, and characterization methods of CMCs, namely...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.9781627081764
EISBN: 978-1-62708-176-4
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005432
EISBN: 978-1-62708-196-2
... which CA models can be used to test those assumptions by a comparison of simulated and experimental results. In many cases, it is necessary to also include a model for the evolution of the parent microstructure during recrystallization, either because of significant recovery during static...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009011
EISBN: 978-1-62708-185-6
...) test temperature, but also the temperature history during the test. Fig. 8 Stress-strain curves for solid torsion specimens of 3.3% Si steel showing effect of gage-length-to-diameter ratio ( L / d ) on flow stress at high strain rates when adiabatic heating occurs. The flow curves are in terms of...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003030
EISBN: 978-1-62708-200-6
... or to investigate a particular wear process ( Ref 13 ). Friction and wear testing generally uses one of two basic strategies: In one case, the test is made as representative of the application conditions as possible; in the other, the test is accelerated by means of increased temperatures, loads, and...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004020
EISBN: 978-1-62708-185-6
... wire drawing or sheet rolling (where the strain rates may be as high as 10 4 /s) from data obtained in a laboratory tension test, in which the strain rates may be as low as 10 −4 /s, the flow stress should be corrected unless m is very small. At hot-working temperatures, m typically rises to 0.10...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003023
EISBN: 978-1-62708-200-6
... dynamic mechanical spectrum of high-temperature epoxy resin system In one common mode of operation, the temperature is increased in jumps of 5 to 10 °C (9 to 18 °F) and is held for 2 min, after which the dynamic mechanical parameters are measured. This technique tends to give conservative values for...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003848
EISBN: 978-1-62708-183-2
.... 11 Permeation rate of elastomers used for handling fuels. Fuel C at 23 °C (73 °F) tested. Heat aging implies change in properties of an elastomer at elevated temperatures. ISO 188, heat aging for high-temperature properties and extrapolation for low-temperature properties, specifies...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003064
EISBN: 978-1-62708-200-6
... Abstract Carbon-carbon composites (CCCs) are introduced in fields that require their high specific strength and stiffness, in combination with their thermoshock resistance, chemical resistance, and fracture toughness, especially at high temperatures. The use of CCCs has expanded as the price of...