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shape distortion

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630055
EISBN: 978-1-62708-270-9
...Abstract Abstract Distortion failures are readily identified by the inherent change in size and/or shape. They are serious because they can lead to other types of failure or may even cause complete collapse of structures, such as bridges, ladders, beams, and columns. Distortion failures may...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290201
EISBN: 978-1-62708-319-5
..., microstructure, distortion, postsintering treatments, and mechanical properties are presented for each. The shaping options include powder-binder approaches such as binder jetting, injection molding, extrusion, slip and slurry casting, centrifugal casting, tape casting, and additive manufacturing. Sintering...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290099
EISBN: 978-1-62708-306-5
... alloys. The following section provides information on the residual stresses and distortion that remain after welding. The focus then shifts to distortion control of weldments. Inclusions and cracking are discussed in detail. The chapter also discusses the causes for reduced fatigue strength...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410487
EISBN: 978-1-62708-265-5
... , p 349 – 355 Distortion of a part may be classified as size distortion or shape distortion. Size distortion is caused by thermal expansion or contraction of a microstructure during heating and cooling, and in steels is significantly influenced by changes in crystal structure that accompany...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610585
EISBN: 978-1-62708-303-4
... The major problems encountered in sheet metal forming are fracturing, buckling and wrinkling, shape distortion, loose metal, and undesirable surface textures. The occurrence of any one or a combination of these conditions can render the sheet metal part unusable. Fracturing Buckling and Wrinkling...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290001
EISBN: 978-1-62708-319-5
... and support friction. Thus, shape distortion and dimensional variation are inherent parts of the powder-binder processes. Distortion is related to nonuniform final size, seen by shape loss after sintering. Figure 1.3 is an example of a right-circular cylinder with sintered diameter change from the top...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310055
EISBN: 978-1-62708-326-3
... as the use of fixtures (press quenching). One form of distortion that may occur on quenching is defined as shape distortion, which is dimensional variation that occurs when the parts are hot and the stress of their own weight leads to dimensional variation, such as bending, warpage, and twisting. Shape...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310285
EISBN: 978-1-62708-326-3
... preheating tool steels before austenitizing is sound practice, it is not always required. For small pieces of simple shape, this step may often be omitted. Preheating is normally employed as a safeguard against the cracking and extreme distortion that can result from the thermal shock to which a cold...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260187
EISBN: 978-1-62708-336-2
..., the changes can be due to recrystallization, solution heat treatment, and precipitation hardening. Other than the dimensional change, shape distortion may occur during heating and warpage during quenching. The extent of distortion varies with changes in section thickness. In very thick sections, the outside...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1999
DOI: 10.31399/asm.tb.cmp.t66770135
EISBN: 978-1-62708-337-9
... ratio Small Small Large Initial shape Arrowhead then irregular Irregular Gouged and ridged (longitudinal gouging) Crack angle with respect to surface Acute Roughly parallel at bottom perpendicular sides Roughly parallel at bottom perpendicular sides Distribution Many teeth Maybe many...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130417
EISBN: 978-1-62708-284-6
.... Source: Ref 20 , 52 Fig. 73 Distortion of individual tooth shape after induction hardening caused by volume changes. Source: Ref 15 , 20 , 55 Fig. 74 Distortion after induction surface hardening with (a) dual frequency and (b) single frequency. Source: Ref 20 , 57...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130255
EISBN: 978-1-62708-284-6
...Abstract Abstract This chapter provides an overview of the fundamental material- and process-related parameters of quenching on residual stress, distortion control, and cracking. It begins with a description of phase transformations during heating and quenching of steel. This is followed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350195
EISBN: 978-1-62708-315-7
... designs that could become distorted during thermal cycling Mask areas not to be coated Cladding Only for relatively simple shapes, especially with flat surfaces Surfaces must be thoroughly cleaned before cladding, so design principles for cleaning also apply Electroless plating Allow for fixturing...
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
...Abstract Abstract Residual, or locked-in internal, stresses are regions of misfit within a metal part or assembly that can cause distortion and fracture just as can the more obvious applied, or service, stresses. This chapter describes the fundamental facts about residual stresses and discusses...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130177
EISBN: 978-1-62708-284-6
... and performance comparison of gas carburizing gears produced by conventional forging, near-net shape casting, and powder metal processing To properly design a component, it is necessary to estimate surface loading, distortion after heat treatment, case depth and carbon profile, case and core hardness...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130001
EISBN: 978-1-62708-284-6
..., and, in particular, to minimize the expense of scrap due to rework of parts that may have undergone excessive distortion or cracked. Heat-Transfer Theory Applied to Heat Treatments Primary Stresses, Secondary Stresses, Peak Stresses, and Residual Stresses Factors Leading to Size and Shape Changes in Heat...
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
... without fracture and to be adjusted in shape. A simple example is familiar to all persons who wear eyeglasses: periodically it is necessary to have the frames adjusted because of the various stresses that are applied to the frames during service. The adjustment is possible because of the ductility...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410215
EISBN: 978-1-62708-280-8
... for core breakages and core lumps Scrap Core breakage, core gas in casting Heat treatment Quench water contamination and treatment Cross member distortion summary Table 8.7 Cross member distortion summary Nature of distortion Noncored design Cored design Influencing factors...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130133
EISBN: 978-1-62708-284-6
... the design procedures given in this work Factors in analysis of cold forging failures Table 2 Factors in analysis of cold forging failures Preforge factors Raw material —chemistry, microstructure, mechanical properties, size, surface finish, and cleanliness Shape sequencing —general...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050093
EISBN: 978-1-62708-311-9
... to Phase Transformation Residual Stress Patterns due to Thermal and Transformation Volume Changes Residual Stresses in Induction Hardening Continuous Cooling Transformation (CCT) Diagram Microstructures Produced during Cooling Size Distortion Shape Change, Bending, or Warpage Carbon...