STRUCTURE OF A NI3AL SINGLE CRYSTAL AFTER SEVERE PLASTIC DEFORMATION

2019 ◽  
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Single Crystal

Structure of Ni3Al Single Crystal after Severe Plastic Deformation

2019 ◽  
Vol 55 (2) ◽  
pp. 133-137
Author(s):  
O. A. Kuts ◽  
S. V. Starenchenko ◽  
Yu. V. Solov’eva ◽  
V. A. Starenchenko ◽  
V. P. Pilyugin ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Single Crystal

Evolution of Microstructure and Texture of Pure Al Single Crystal Having {112} Orientation during Severe Plastic Deformation

2007 ◽  
Vol 26-28 ◽  
pp. 405-408 ◽  
Author(s):  
Naoki Ishida ◽  
Daisuke Terada ◽  
Keizo Kashihara ◽  
Nobuhiro Tsuji
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Single Crystal ◽  
Accumulative Roll Bonding ◽  
Equivalent Strain ◽  
Roll Bonding ◽  
Single Crystal Specimen ◽  
Ultrafine Grained ◽  
The Matrix ◽  
Evolution Of Microstructure

The sheet of pure Al (99.99%) single crystal having (1 12)[110] orientation was deformed up to equivalent strain of 6.4 by the accumulative roll-bonding (ARB) process. The microstructures and orientation of the single crystal ARB-processed by various cycles were characterized by the EBSP measurement. After 1cycle-ARB process, the crystal was macroscopically subdivided into two matrices (macroscopic grain subdivision). These matrices exhibits two different variants of brass orientation, which are (1 01)[121] and (011)[211]. In addition to the macroscopic grain subdivision, microscopic grain subdivision also occurred within the matrix to form an ultrafine grained structure in the single crystal specimen after high strains.

Fragmentation, Texturing and Plastic Flow in the Subsurface of Friction-Processed Copper Single Crystal

2013 ◽  
Vol 872 ◽  
pp. 30-35 ◽  
Author(s):  
Andrey V. Chumaevsky ◽  
Dmitry V. Lychagin ◽  
Sergei Yu. Tarasov ◽  
Alexandr Melnikov
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Single Crystal ◽  
Single Crystals ◽  
Crystal Orientation ◽  
Normal Load ◽  
Dry Sliding ◽  
Texture Formation ◽  
Load Axis ◽  
Copper Single Crystals

Copper single crystals grown according to the Bridgman method and having their axes [] or [11 aligned with the normal load axis were processed by dry sliding. As shown, sliding-induced severe plastic deformation occurred in the subsurface of single crystals and caused formation of a lip by mechanism of texture formation. The SEM structure of this lip was found to be composed of fragments with their shapes dependent on the single crystal orientation with respect to normal load and friction force.

scholarly journals Microstructure and Texture of Hydrostatic Extrusion Deformed Ni Single Crystals and Polycrystal

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
D. Jakubowska ◽  
J. Zdunek ◽  
M. Kulczyk ◽  
J. Mizera ◽  
K. J. Kurzydłowski
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Single Crystal ◽  
Single Crystals ◽  
Relevant Literature ◽  
Hydrostatic Extrusion ◽  
Total Deformation ◽  
Polycrystalline Nickel ◽  
Before And After

The differences in the microstructure and texture of two Ni single crystals, with different initial orientations (100and110), and of polycrystalline nickel, before and after severe plastic deformation (SPD) produced by hydrostatic extrusion (HE), have been investigated. The crystals were deformed by a two-step HE process with a total deformation value ofε=1.2. The global texture, mechanical properties, and microstructure were examined after the deformation. In every investigated sample, the presence of111fibre texture was noted, while the starting orientation of a100Ni single crystal was preserved in 50% of the volume. The results obtained were compared with the relevant literature data.

Severe plastic deformation of Al-1%Cu Alloy processed by a Simple Cyclic Extrusion Compression technique

2018 ◽  
Vol 1 (1) ◽  
pp. 77-90
Author(s):  
Walaa Abdelaziem ◽  
Atef Hamada ◽  
Mohsen A. Hassan
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Deformation Behavior ◽  
Cast Alloy ◽  
Surface Hardness ◽  
Grain Structure ◽  
Compression Technique ◽  
Cu Alloy ◽  
Cyclic Extrusion Compression

Severe plastic deformation is an effective method for improving the mechanical properties of metallic alloys through promoting the grain structure. In the present work, simple cyclic extrusion compression technique (SCEC) has been developed for producing a fine structure of cast Al-1 wt. % Cu alloy and consequently enhancing the mechanical properties of the studied alloy. It was found that the grain structure was significantly reduced from 1500 µm to 100 µm after two passes of cyclic extrusion. The ultimate tensile strength and elongation to failure of the as-cast alloy were 110 MPa and 12 %, respectively. However, the corresponding mechanical properties of the two pass CEC deformed alloy are 275 MPa and 35%, respectively. These findings ensure that a significant improvement in the grain structure has been achieved. Also, cyclic extrusion deformation increased the surface hardness of the alloy by 49 % after two passes. FE-simulation model was adopted to simulate the deformation behavior of the material during the cyclic extrusion process using DEFORMTM-3D Ver11.0. The FE-results revealed that SCEC technique was able to impose severe plastic strains with the number of passes. The model was able to predict the damage, punch load, back pressure, and deformation behavior.

TECHNOLOGIES FOR MANUFACTURING NANOSTRUCTURED SURFACES

2020 ◽  
Author(s):  
Андрей Дмитриевич Бухтеев ◽  
Виктория Буянтуевна Бальжиева ◽  
Анна Романовна Тарасова ◽  
Фидан Гасанова ◽  
Светлана Викторовна Агасиева
Keyword(s):  
Plastic Deformation ◽  
Surface Modification ◽  
Severe Plastic Deformation ◽  
Pressing Pressure ◽  
Pressure Treatment ◽  
Structured Surfaces ◽  
Nanostructured Surfaces ◽  
Angular Pressing ◽  
Multilayer Composites ◽  
Compaction Of Powders

В данной статье рассматривается применение и технологии получения наноструктурированных поверхностей. Рассмотрены такие методы как компактирование порошков (изостатическое прессование, метод Гляйтера), интенсивная пластическая деформация (угловое кручение, равноканальное угловое прессование, обработка давлением многослойных композитов) и модификация поверхности (лазерная обработка, ионная бомбардировка). This article discusses the application and technology for obtaining nano-structured surfaces. Methods such as compaction of powders (isostatic pressing, Gleiter method), severe plastic deformation (angular torsion, equal-channel angular pressing, pressure treatment of multilayer composites) and surface modification (laser treatment, ion bombardment) are considered.

Micromachining Imposed Subsurface Plastic Deformation in Single-Crystal Aluminum

2020 ◽  
Author(s):  
Sudhanshu Nahata ◽  
Marzyeh Moradi ◽  
Yoosuf N. Picard ◽  
Nithyanand Kota ◽  
O. Burak Ozdoganlar
Keyword(s):  
Plastic Deformation ◽  
Single Crystal
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