Contribution of shear bands to rolling texture development in FCC metals and alloys.

Three dimensional texture analysis by means of orientation distribution functions (ODF) was used to examine the texture development during rolling at 473 K in an austenitic stainless steel. With the help of ODFs results, the different stages of texture development could be assigned to the existing theories of heterogeneous deformation mechanisms of low SFE face-centred cubic metals. The texture at very low degree of rolling consists of two limited orientation tubes with their fibre axes 〈110〉//ND and 〈110〉60∘ND and agrees with the predictions made by Taylor model. With further deformation, twinning causes the reduction of ≈{112}〈111〉 component and leads to the formation of twin {552}〈115〉. Abnormal slip on slip planes parallel to the twin boundaries rotates the twins into the {332}〈113〉 and {111}〈110〉 positions. The shear bands formation in the rotated twin-matrix lamellae changes their orientations near to {011}〈100〉 and {011}〈112〉 positions. Finally, normal slip again continues and sharpens the brass-type rolling texture.

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The Mechanism of Influence of Non-Octahedral Slip on Rolling Texture Development in FCC Metals. Computer Simulation

Textures and Microstructures ◽

10.1155/tsm.21.251 ◽

1993 ◽

Vol 21 (4) ◽

pp. 251-259 ◽

Cited By ~ 1

Author(s):

S. V. Divinskii ◽

V. N. Dnieprenko

Keyword(s):

Computer Simulation ◽

Rolling Texture ◽

Texture Development ◽

Type Model ◽

Slip Systems ◽

Fcc Metals ◽

Component Development ◽

Slip Planes ◽

Characteristic Features ◽

Octahedral Slip

Simulation of the copper-type rolling texture development in FCC metals based on homogeneous slip under conditions of no constrains (Sachs-type model) is presented. Detailed analysis shows that, in fact, effective activation of a few (two or three, sometimes greater) independent slip systems occurs after reaching of some strain. These slip systems act by turns and may be essentially considered as acting simultaneously. Therefore, such extended description may be considered as a model which is intermediate between Taylor and Sachs ones. Taking these results into account, the characteristic features of main texture component development in copper under rolling have been studied by a computer simulation. Both octahedral, {111}, and cubic, {100}, slip planes are shown to act simultaneously in the process of the {112}〈111¯〉 component formation, but the action of only {111}〈11¯0〉 slip systems is characteristic for the {110}〈11¯2〉 component formation. The important role of the non-octahedral sip systems in plastic deformation processes in FCC metals of high staking-fault energy are also confirmed by the coincidence of model shear textures and experimental surface textures.

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Large-Strain Softening of Metals at Elevated Temperatures by Deformation Texture Development

Metals ◽

10.3390/met11071059 ◽

2021 ◽

Vol 11 (7) ◽

pp. 1059

Author(s):

Michael E. Kassner ◽

Roya Ermagan

Keyword(s):

Dislocation Density ◽

Strain Softening ◽

Elevated Temperatures ◽

Large Strain ◽

Deformation Texture ◽

Metals And Alloys ◽

Texture Development ◽

Fcc Metals ◽

Novel Concept ◽

Torsion Deformation

Many (if not a majority) of metals and alloys evince substantial softening with torsion deformation to strains not usually achievable in tension. Of course, softening has long been observed by discontinuous dynamic recrystallization (DDRX) but this paper will discuss cases where softening is associated by texture development with large-strain deformation that is not reliant on changes in the dislocation density. This paper discusses the work of the current authors on FCC metals and alloys and extends to a new discussion of BCC and HCP cases. The analysis of the basis for torsional softening in BCC steel and HCP Zr discussed here is a novel concept that has not been addressed in the literature before.

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The contribution of macroscopic shear bands to the rolling texture of FCC metals

Scripta Metallurgica ◽

10.1016/0036-9748(77)90113-2 ◽

1977 ◽

Vol 11 (7) ◽

pp. 581-585 ◽

Cited By ~ 55

Author(s):

J. Gil Sevillano ◽

P. Van Houtte ◽

E. Aernoudt

Keyword(s):

Shear Bands ◽

Rolling Texture ◽

Fcc Metals

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The Effects of Shear Bands on the Rolling Texture Development in 70/30 Brass

Journal of the Japan Institute of Metals and Materials ◽

10.2320/jinstmet1952.44.5_555 ◽

1980 ◽

Vol 44 (5) ◽

pp. 555-561 ◽

Cited By ~ 8

Author(s):

Kenji Morii ◽

Mitsuo Mera ◽

Yutaka Nakayama

Keyword(s):

Shear Bands ◽

Rolling Texture ◽

Texture Development

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Rolling Texture of Cu–30%Zn Alloy Using Taylor Model Based on Twinning and Coplanar Slip

Crystals ◽

10.3390/cryst11111351 ◽

2021 ◽

Vol 11 (11) ◽

pp. 1351

Author(s):

Shih-Chieh Hsiao ◽

Sin-Ying Lin ◽

Huang-Jun Chen ◽

Ping-Yin Hsieh ◽

Jui-Chao Kuo

Keyword(s):

Boundary Conditions ◽

Shear Bands ◽

Rolling Texture ◽

Mechanical Twinning ◽

Taylor Model ◽

Slip Model ◽

Fcc Metals ◽

Model Based ◽

First Approximation ◽

Zn Alloy

A modified Taylor model, hereafter referred to as the MTCS(Mechanical-Twinning-withCoplanar-Slip)-model, is proposed in the present work to predict weak texture components in the shear bands of brass-type fcc metals with a twin–matrix lamellar (TML) structure. The MTCS-model considers two boundary conditions (i.e., twinning does not occur in previously twinned areas and coplanar slip occurs in the TML region) to simulate the rolling texture of Cu–30%Zn. In the first approximation, texture simulation using the MTCS-model revealed brass-type textures, including Y {1 1 1}⟨1 1 2⟩ and Z {1 1 1}⟨1 1 0⟩ components, which correspond to the observed experimental textures. Single orientations of C (1 1 2)[1 ¯ 1 ¯ 1] and S’ (1 2 3)[4¯ 1¯ 2] were applied to the MTCS-model to understand the evolution of Y and Z components. For the Y orientation, the C orientation rotates toward T (5 5 2)[1 1 5] by twinning after 30% reduction and then toward Y (1 1 1)[1 1 2] by coplanar slip after over 30% reduction. For the Z orientation, the S’ orientation rotates toward T’ (3 2 1)[2 1 ¯4¯] by twinning after 30% reduction and then toward Z (1 1 1)[1 0 1¯] by coplanar slip after over 30% reduction.

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