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Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700135
EISBN: 978-1-62708-279-2
...Abstract Abstract This chapter briefly discusses the characteristics of mechanical twins and stacking faults in close-packed planes. It provides an overview of the composition, microstructures, thermodynamics, processing, deformation mechanism, mechanical properties, formability, and special...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540357
EISBN: 978-1-62708-309-6
... deformation of crystal lattices can also occur by other processes such as twinning and, in special circumstances, by the migration of vacant lattice sites. This appendix describes the notation used to specify lattice planes and directions and discusses the mechanisms of slip and twinning as well as the effect...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410233
EISBN: 978-1-62708-265-5
... (DP) steels, transformation-induced plasticity (TRIP) steels, and martensitic low-carbon steels. It also discusses twinning-induced plasticity (TWIP) steels along with quenched and partitioned (Q&P) steels. dual-phase steel low-carbon steel microstructure quenched and partitioned steel...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2021
DOI: 10.31399/asm.tb.ciktmse.t56020001
EISBN: 978-1-62708-389-8
..., and how they respond to applied stresses and strains. The chapter makes extensive use of graphics to illustrate crystal lattice structures and related concepts such as vacancies and interstitial sites, ion migration, volume expansion, antisite defects, edge and screw dislocations, slip planes, twinning...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2021
DOI: 10.31399/asm.tb.ciktmse.t56020013
EISBN: 978-1-62708-389-8
... of twinning planes on stacking sequences. The chapter also includes problems on how the formation of precipitates can produce slip planes and how grain boundaries can act as obstacles to dislocation motion. dislocation mobility edge dislocations glide plane grain boundaries miscibility pinning...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230339
EISBN: 978-1-62708-298-3
... these machining operations are conducted and describes the effect of tooling materials, cutting speeds, metal-removal rates, and other variables. It also explains how to assess and remove surface damage caused by machining such as microcracks and twins. beryllium machining surface damage 21.1 Overview...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480095
EISBN: 978-1-62708-318-8
... crystal structure Fig. 5.4 Twinning in high-purity titanium. The twins are the needlelike bands in the grains. In some instances, the twins extend entirely across a grain. Etchant: 10%HF-5%HNO 3 . Original magnification: 250x Fig. 5.5 Twinning planes in titanium. Although most twinning...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270076
EISBN: 978-1-62708-301-0
... to overload conditions. It also recommends the use of twin suspension hooks to make attachment points more stable under difficult flight conditions. fractography scanning electron microscopy support structures visual examination Summary Background Visual Examination of General Physical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240017
EISBN: 978-1-62708-251-8
... coherent phase boundaries, twin boundaries, and stacking faults depend on the crystalline structure. 2.4.1 Grain Boundaries 2.4.2 Polycrystalline Metals 2.4.3 Phase Boundaries 2.4.4 Twinning 2.4.5 Stacking Faults Volume defects, such as porosity and microcracks, almost always reduce...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700023
EISBN: 978-1-62708-279-2
... and the presence of imperfections such as solutes, inclusions, precipitates, dislocations, twins, grain boundaries, and cracks in the metal. Mechanical and performance properties of steels are determined by three main factors: Composition of constituents Microstructures resulting from heat treatment...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270045
EISBN: 978-1-62708-301-0
... explosive conditions takes place at very high strain rates, of the order of 10 6 s −1 . Two important microstructural changes, namely, adiabatic shear and twinning, can take place under such conditions. Adiabatic Shear Twinning In 1979, a Boeing 737 aircraft on a scheduled flight from Trivandrum...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700199
EISBN: 978-1-62708-279-2
... through the use of AHSS grades and an optimized design. The body structure used more than 50% AHSS including dual-phase (DP), transformation-induced plasticity (TRIP), twinning-induced plasticity (TWIP), complex-phase (CP), and martensitic (MS) grades to improve structural performance and reduce mass...
Series: ASM Technical Books
Publisher: ASM International
Published: 31 December 2020
DOI: 10.31399/asm.tb.phtbp.t59310001
EISBN: 978-1-62708-326-3
... Deformation by twinning Fig. 27 Solubility curve of carbon in the ferritic (bcc) iron and a portion of the eutectoid region in carbon steel. See also Fig. 2 and 3 in Chapter 2 . The Ae 2 line is the boundary under equilibrium conditions between the one-phase α ferrite region and the two-phase...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2021
DOI: 10.31399/asm.tb.ciktmse.9781627083898
EISBN: 978-1-62708-389-8
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2012
DOI: 10.31399/asm.tb.pdub.t53420363
EISBN: 978-1-62708-310-2
... of slip systems increases, and material ductility is beneficially affected. In addition, polycrystalline hcp metals can also deform by a mechanism called twinning. This section will give a short introduction to identifying crystalline planes and crystalline directions. Miller Indices for Cubic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060013
EISBN: 978-1-62708-261-7
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410063
EISBN: 978-1-62708-265-5
.... and Pitsch W. , Deformation Twins in Martensite , Acta Metall ., Vol 12 , 1964 , p 278 – 279 10.1016/0001-6160(64)90203-2 5.44 Greninger A.B. and Troiano A.R. , Crystallography of Austenite Decomposition , Trans. AIME , Vol 140 , 1940 , p 307 – 336 5.45 Ledbetter...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000203
EISBN: 978-1-62708-312-6
..., and abundant twin boundaries. Sintering time 30 minutes and dew point of sintering atmosphere –46 °C (–55 °F). Glyceregia etch Fig. 10 Photomicrograph of high temperature 1288 °C (2350 °F), 30 minutes, hydrogen sintered 316L showing well-rounded porosity, precipitate-free grain boundaries, and twin...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2016
DOI: 10.31399/asm.tb.ascaam.t59190001
EISBN: 978-1-62708-296-9
... Fig. 1.27 Twin-plane reentrant edge (TPRE) mechanism of crystal growth: subsequent stages of formation of silicon crystal in the shape of plate. (a) Crystal of two twins, closure of twins due to ridge formation. (b) Crystal with two twins, reentrant groove on the surface. Source: Ref 35 , 38 , 41...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700071
EISBN: 978-1-62708-279-2
... is determined by an intrinsic lattice resistance to dislocation glide. Lattice imperfections, such as dislocations, twins, solid solutions, impurities, precipitates, and grain boundaries provide obstacles to dislocation glide and, hence, strengthen the metal alloys. Strength in AHSS is determined by a number...