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Thermal stresses

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780295
EISBN: 978-1-62708-281-5
...Abstract Abstract In an attempt to explain the stresses encountered in the plastics industry, this article first defines the different types of internal stresses in amorphous polymers. Each type of thermal stress is then discussed in detail, with reference to the mechanism of generation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290099
EISBN: 978-1-62708-306-5
...Abstract Abstract During fusion welding, the thermal cycles produced by the moving heat source causes physical state changes, metallurgical phase transformations, and transient thermal stresses and metal movement. This chapter begins by discussing weld metal solidification behavior...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240243
EISBN: 978-1-62708-251-8
... and growth occurs. It describes the most effective methods of improving fatigue life. The chapter also explains the effect of geometrical stress concentrations on fatigue. In addition, it explores the environmental effects of corrosion fatigue, low-temperature fatigue, high-temperature fatigue, and thermal...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430325
EISBN: 978-1-62708-253-2
... fatigue flow-induced vibrations mechanical loads thermal cycling thermal fatigue Failure of boiler tubes under repeated cyclic or fluctuating loading conditions is known as fatigue. Almost 80% of tube failures in firetube boilers are attributed to fatigue. Fatigue can occur at stresses much lower...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060223
EISBN: 978-1-62708-343-0
... mismatch of tungsten-fiber and nickel-base superalloy matrix. Courtesy of D.W. Petrasek. Source: Ref 9.5 Fig. 9.2 Schematic thermal expansion response of a metal-matrix composite and its constituents. (a) Cold, stress free. (b) Hot (+Δ T ), unbonded. (c) Hot (+Δ T ), bonded Fig. 9.1...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630035
EISBN: 978-1-62708-270-9
... the basic mechanisms of residual stress formation: thermal, transformational, mechanical, and chemical. residual stress thermal residual stresses transformational residual stresses mechanical residual stresses IT IS LITERALLY a shattering experience to witness a metal part suddenly split...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490111
EISBN: 978-1-62708-340-9
... in thermal and isothermal fatigue tests. Fig. 4.1. (a) Nomenclature for test parameters involved in cyclic stress testing, and (b) typical S-N curve for fatigue. Fig. 4.7. Effects of inclusions on fatigue life of type 4340 steel ( Ref 4 ). Fig. 4.8. S-N curves for IN-738 LC...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630237
EISBN: 978-1-62708-270-9
... applications. The principal types of elevated-temperature failure mechanisms discussed in this chapter are creep, stress rupture, overheating failure, elevated-temperature fatigue, thermal fatigue, metallurgical instabilities, and environmentally induced failure. The causes, features, and effects...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550325
EISBN: 978-1-62708-307-2
... stress. The chapter also includes a section on the uses of thermoplastic and thermosetting resins and provides information on fabrication processes and fastening and joining methods. engineering plastics joining thermal properties AN ENGINEERING PLASTIC can be defined as a synthetic polymer...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060001
EISBN: 978-1-62708-343-0
... modification to accommodate the influence of mechanical stress activation. Fig. 1.1 Schematic of thermal activation energy using a mechanical energy analogy If a slight tilt is given to the troughs ( Fig. 1.1e ), the ball would have a small bias to progress more easily in the downhill direction...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780146
EISBN: 978-1-62708-281-5
... performance, namely plasticization, solvation, swelling, environmental stress cracking, polymer degradation, surface embrittlement, and temperature effects. chemical susceptibility thermal oxidative degradation photo-oxidative degradation environmental corrosion chemical corrosion plasticization...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090095
EISBN: 978-1-62708-266-2
... of composition, microstructure, and thermal history. Sensitization is particularly detrimental to austenitic stainless steels, and in many cases, eliminating it will eliminate the susceptibility to SCC. The chapter includes an extensive amount of data and illustrations. hydrogen embrittlement stainless...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630101
EISBN: 978-1-62708-270-9
...Abstract Abstract Ductile fracture results from the application of an excessive stress to a metal that has the ability to deform permanently, or plastically, prior to fracture. Careful examination and knowledge of the metal, its thermal history, and its hardness are important in determining...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310161
EISBN: 978-1-62708-286-0
...Recommended thermal processing temperatures for austenitic alloys Table 1 Recommended thermal processing temperatures for austenitic alloys Alloy Annealing temperature, °C Annealing temperature, °F ASTM A480 (a) 2006, °F Stress relieving, °F Stress relieving, °C Standard alloys...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120055
EISBN: 978-1-62708-269-3
... are used to make titanium stronger, tougher, more ductile, and easier to machine as well as more resistant to the effects of corrosion and thermal and mechanical fatigue. It describes accepted practices for stress relieving, aging, annealing, and post-treatment processing along with associated challenges...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060231
EISBN: 978-1-62708-343-0
... Cracking correlates better with use cycles than time of use Finite-element structural analysis used to estimate local strain range K t of 1.9 to 2.2; local surface strain range 2.3% max, dropping to only 0.5% at 0.5 mm (0.020 in.) below surface Transient thermal stresses at shutdown and startup...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130001
EISBN: 978-1-62708-284-6
... or warpage and to control thermal stresses in the range of 250–600 °C (480–1110 °F). The carbon equivalent controls the propensity for steel to crack. The holding time is dependent on geometrical factors related to the furnace (emissivities, temperature, and atmosphere composition) and load (type...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.ex2.t69980417
EISBN: 978-1-62708-342-3
... compressive forces during the extrusion cycle Fluctuating tensile forces during the extrusion cycle Fluctuating bending forces in the extrusion cycle Alternating stress concentrations at unavoidable notches in the shape-forming die aperture Fluctuating thermal stresses in the extrusion cycle...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240303
EISBN: 978-1-62708-251-8
... diffusivity are m 2 /s. Thermal stresses are stresses induced in a body as a result of temperature changes. Thermal stresses are important because they can lead to undesirable plastic deformation or even fracture. If a metal bar is heated or cooled uniformly, there are no temperature gradients...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040193
EISBN: 978-1-62708-300-3
..., the tools are considered rigid; thus, die deformation and stresses are neglected. However, in precision forging operations, the relatively small elastic deformations of the dies may influence the thermal and mechanical loading conditions and the contact stress distribution at the die/workpiece interface...