Deformation behavior, strength, and plasticity of titanium with a submicrocrystalline structure formed under warm rolling

2012 ◽  
Vol 54 (9) ◽  
pp. 1046-1055 ◽  
Author(s):  
E. F. Dudarev ◽  
A. N. Tabachenko ◽  
O. A. Kashin ◽  
G. P. Bakach ◽  
A. B. Skosyrskii ◽  
...  
Keyword(s):  
Deformation Behavior ◽  
Warm Rolling ◽  
Submicrocrystalline Structure ◽  
Strength And Plasticity ◽  
Behavior Strength

The Formation of Submicrometer Scale Grains in a Super304H Steel during Multiple Compressions at 700°C

2010 ◽  
Vol 667-669 ◽  
pp. 565-570 ◽  
Author(s):  
Marina Tikhonova ◽  
Valeriy Dudko ◽  
Andrey Belyakov ◽  
Rustam Kaibyshev
Keyword(s):  
Stainless Steel ◽  
Steady State ◽  
Austenitic Stainless Steel ◽  
Deformation Behavior ◽  
Structural Changes ◽  
Submicrocrystalline Structure ◽  
Ultrafine Grains ◽  
Maximum Value ◽  
Average Size ◽  
Super304h Steel

The deformation behavior and the microstructure evolution in a 304-type austenitic stainless steel were studied in multiple forging tests at temperature of 700°C. The flow stresses increased to its maximum value with straining to about 1 and, then, slightly decreased resulting in a steady state deformation behavior at strains above 3. The structural changes were characterized by the development of a spatial net of deformation subboundaries, the misorientations of which increased to the values typical of conventional grain boundaries. The number of ultrafine grains increased with straining, leading to development of submicrocrystalline structure. The fraction of submicrocrystalline structure composed of ultrafine grains with an average size of about 300 nm exceeded 0.7 after straining to 2.

Effect of Pulse Current on Tensile Deformation Behavior of IN718 Alloy

2012 ◽  
Vol 509 ◽  
pp. 56-63 ◽  
Author(s):  
Yang Liu ◽  
Lei Wang ◽  
Fei Feng ◽  
Xu Dong Lu ◽  
Bei Jiang Zhang
Keyword(s):  
Tensile Test ◽  
Deformation Behavior ◽  
Room Temperature ◽  
Pulse Current ◽  
Tensile Deformation ◽  
Dislocation Motion ◽  
Deformation Resistance ◽  
Deformation Ability ◽  
Lower Temperature ◽  
Strength And Plasticity

The pulse current was performed on the IN718 alloy during tensile test at room temperature and elevated temperature in the present study. The effect of pulse current on the deformation behavior of the alloy and the mechanisms were investigated. The results show that the deformation resistance decreases and the elongation increases significantly of IN718 alloy during tensile test at room temperature and 1073 K with the increase of pulse current. And the effect of pulse current on the strength and plasticity of the alloy increases as pulse current energy increases. The electroplastic effect of pulse current can promote the dislocation motion, and thus decrease the deformation resistance of the alloy during the tensile deformation. The pulse current reduces the starting temperature of recrystallization, promotes the recrystalllization nucleation, and thus makes it possible that the dynamic recrystallization would occur at lower temperature than that in the conventional temperature field. This is the main reason for the decrease of deformation resistance and the increase of plastic deformation ability of IN718 alloy under pulse current.

Numerical simulation and experimental research on hot extrusion of 5B70 aluminum alloy complex end frame part

2020 ◽  
Vol 234 (16) ◽  
pp. 3221-3227
Author(s):  
Yang Liu ◽  
Jingxuan Zhang ◽  
Zhibo Li ◽  
Qi Liu ◽  
Guofeng Wang
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
High Temperature ◽  
Deformation Behavior ◽  
Deformation Property ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Strength And Plasticity

5B70 aluminium alloy is strengthened by Sc and Zr. It has higher strength and plasticity than common aluminum alloy. Meanwhile, 5B70 aluminum alloy which is widely used as a structural material also presents some advantages, such as corrosion resistance, excellent formability, and weldability. In this study, the high-temperature deformation behavior of 5B70 aluminum alloy and the hot extrusion process of the complex end frame part were studied, and the deformation property of 5B70 aluminum alloy at elevated temperature was analyzed by the high-temperature compression test. The numerical simulation of hot extrusion of complex end frame part was carried out. Moreover, the optimal hot extrusion parameters of 5B70 aluminum alloy were obtained, and the hot extrusion property and microstructure evolution of 5B70 aluminum alloy were investigated.

Deformation Behavior of Titanium VT1-0 With Submicrocrystalline Structure Formed by the Method of Helical Extrusion

2014 ◽  
Vol 55 (11-12) ◽  
pp. 603-607 ◽  
Author(s):  
V. E. Olshanetskii ◽  
L. P. Stepanova ◽  
V. L. Greshta ◽  
D. V. Pavlenko ◽  
D. V. Tkach
Keyword(s):  
Deformation Behavior ◽  
Submicrocrystalline Structure

Plastic deformation of θ ' in Al-4%Cu alloy

1978 ◽  
Vol 36 (1) ◽  
pp. 576-577
Author(s):  
Shrikant P. Bhat
Keyword(s):  
Deformation Behavior ◽  
Room Temperature ◽  
Electron Microscopic Observation ◽  
Bulk Alloy ◽  
Electron Microscopic ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Orowan Mechanism ◽  
The Subject ◽  
Cyclic Straining

deformation behavior of Al-Cu alloys aged to contain θ ' has been the subject of many investigations (e.g., Ref. 1-5). Since θ ' is strong and hard, dislocations bypass θ ' plates (Orowan mechanism) at low strains. However, at high strains the partially coherent θ ' plates are probably sheared, although the mechanism is complex, depending on the form of deformation. Particularly, the cyclic straining of the bulk alloy is known to produce gross bends and twists of θ '. However, no detailed investigation of the deformation of θ ' has yet been reported; moreover, Calabrese and Laird interpreted the deformation of θ ' as largely being elastic.During an investigation of high temperature cyclic deformation, the detailed electron-microscopic observation revealed that, under reversed straining conditions, θ ' particles are severely distorted--bent and twisted depending on the local matrix constraint. A typical electronmicrograph, showing the twist is shown in Fig. 1. In order to establish whether the deformation is elastic or plastic, a sample from a specimen cycled at room temperature was heated inside the microscope and the results are presented in a series of micrographs (Fig. 2a-e).

Observation of secondary slip systems in tungsten bicrystals

1984 ◽  
Vol 42 ◽  
pp. 478-479
Author(s):  
J. R. Fekete ◽  
R. Gibala
Keyword(s):  
Stress Field ◽  
Grain Boundaries ◽  
Deformation Behavior ◽  
Stress Axis ◽  
Polycrystalline Materials ◽  
Slip Systems ◽  
Metallic Materials ◽  
Twist Boundary ◽  
Secondary Slip ◽  
Plane Normal

The deformation behavior of metallic materials is modified by the presence of grain boundaries. When polycrystalline materials are deformed, additional stresses over and above those externally imposed on the material are induced. These stresses result from the constraint of the grain boundaries on the deformation of incompatible grains. This incompatibility can be elastic or plastic in nature. One of the mechanisms by which these stresses can be relieved is the activation of secondary slip systems. Secondary slip systems have been shown to relieve elastic and plastic compatibility stresses. The deformation of tungsten bicrystals is interesting, due to the elastic isotropy of the material, which implies that the entire compatibility stress field will exist due to plastic incompatibility. The work described here shows TEM observations of the activation of secondary slip in tungsten bicrystals with a [110] twist boundary oriented with the plane normal parallel to the stress axis.

Transformation and Deformation Behavior in Sputter-Deposited Ti-Ni-Cu Thin Films

1995 ◽  
Vol 05 (C8) ◽  
pp. C8-689-C8-694 ◽  
Author(s):  
T. Hashinaga ◽  
S. Miyazaki ◽  
T. Ueki ◽  
H. Horikawa
Keyword(s):  
Thin Films ◽  
Deformation Behavior ◽  
Sputter Deposited
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