The effect of scale levels of rotational plastic deformation modes on the strain resistance of polycrystals

Polarization of deformation twinning (its propagation in a certain sense but not in the opposite one) is taken for granted. However, the same phenomenon can occur for a superdislocation glide as well, as is demonstrated in this paper. The consequences for plastic deformation of polysynthetically twinned TiAl crystals with the lamellar interfaces parallel to the loading direction are discussed. It is not the interface itself that is an obstacle for propagating deformation but also the fact that a deformation mode with the parallel Burgers vector cannot be activated in the neighboring lamella due to the directionality of superdislocation motion leading to additional stress increase.

Download Full-text

Deformation Modes and Anomalous Strengthening of Ni3X -Type Intermetallic Compounds with the Geometrically Close-Packed Structure

Materials Science Forum ◽

10.4028/www.scientific.net/msf.502.145 ◽

2005 ◽

Vol 502 ◽

pp. 145-150 ◽

Cited By ~ 2

Author(s):

Yukichi Umakoshi ◽

Koji Hagihara ◽

Takayoshi Nakano

Keyword(s):

Plastic Deformation ◽

Crystal Structures ◽

Intermetallic Compounds ◽

Deformation Behavior ◽

Deformation Characteristics ◽

Close Packed Structure ◽

Plastic Deformation Behavior ◽

Packed Structure ◽

Deformation Modes

Plastic deformation behavior including anomalous strengthening of Ni3X-type compounds with D019, D0a and D024 structure were examined and summarized, focusing on the correlation between deformation characteristics and features of their crystal structures.

Download Full-text

Comparison of microstructures and mechanical properties of a Cu–Ag alloy processed using different severe plastic deformation modes

Materials Science and Engineering A ◽

10.1016/j.msea.2011.01.057 ◽

2011 ◽

Vol 528 (13-14) ◽

pp. 4331-4336 ◽

Cited By ~ 39

Author(s):

Y.Z. Tian ◽

S.D. Wu ◽

Z.F. Zhang ◽

R.B. Figueiredo ◽

N. Gao ◽

...

Keyword(s):

Mechanical Properties ◽

Plastic Deformation ◽

Severe Plastic Deformation ◽

Microstructures And Mechanical Properties ◽

Deformation Modes

Download Full-text

Effect of Plastic Deformation Modes on Tensile Properties of Beta Titanium Alloys

Transactions of the Japan Institute of Metals ◽

10.2320/matertrans1960.27.496 ◽

1986 ◽

Vol 27 (7) ◽

pp. 496-503 ◽

Cited By ~ 41

Author(s):

S. Hanada ◽

T. Yoshio ◽

O. Izumi

Keyword(s):

Plastic Deformation ◽

Titanium Alloys ◽

Tensile Properties ◽

Beta Titanium ◽

Deformation Modes ◽

Beta Titanium Alloys

Download Full-text

Some Plastic Deformation Modes for Indentation of Half Space by a Rigid Body With Serrated Surface as a Model of Roughness Transfer in Metal Forming

Journal of Engineering Materials and Technology ◽

10.1115/1.1446864 ◽

2002 ◽

Vol 124 (2) ◽

pp. 146-151 ◽

Cited By ~ 2

Author(s):

Jingyu Shi ◽

D. L. S. McElwain ◽

S. A. Domanti

Keyword(s):

Plastic Deformation ◽

Finite Element ◽

Free Surface ◽

Rigid Body ◽

Half Space ◽

Metal Forming ◽

Forming Process ◽

Perfectly Plastic ◽

Metal Forming Process ◽

Deformation Modes

This paper is concerned with the plastic deformation modes of the free surface of the half space between the teeth on the serrated surface of a rigid body. The rigid body indents the half space perpendicularly and the material of the half space is assumed to be elastic/rigid perfectly plastic. Plane-strain conditions are assumed. The emphasis in this paper is on the profile left on the surfaces of the material when the indentation proceeds to some depth and then the indenter is removed. Based on the observations from finite element results, slip line fields for the plastic deformation regions at various stages of indentation are proposed and the corresponding hodographs for the velocity field are presented. This has application in roughness transfer of final metal forming process.

Download Full-text

Deformation-Induced Microstructure Effects on Ultrasonic Waves: Simple Shear Versus Pure Shear

Volume 2: Computer Technology ◽

10.1115/pvp2006-icpvt-11-93131 ◽

2006 ◽

Author(s):

S. H. Tang ◽

S. Wu

Keyword(s):

Plastic Deformation ◽

Point Defects ◽

Simple Shear ◽

Pure Shear ◽

Fractal Dimensions ◽

Ultrasonic Waves ◽

Striking Difference ◽

Wave Velocities ◽

Microstructure Effects ◽

Deformation Modes

Although similar in total strain in simple shear and pure shear, they are very diverse in deformation modes, and the effect of these deformation modes on ultrasonic waves is very different. This paper aims to investigate deformation-induced microstructures and their effects on ultrasonic waves under simple and pure shear states. Texture evolutions, plastic spins, point defects induced by cross slips and fractal dimensions are analyzed via finite element polycrystal model. The investigation indicates that the texture evolutions are the same and transverse wave velocities depend on textures mainly; however, the point defects induced by cross slips show a striking difference between simple shear and pure shear, this implies that longitudinal wave velocities are sensitively influenced by point defects during plastic deformation.

Download Full-text