An etching characterization method for revealing the plastic deformation zone in a SUS303 stainless steel

2009 ◽  
Vol 45 (5) ◽  
pp. 1220-1226 ◽  
Author(s):  
Mitsuhiro Okayasu ◽  
Kazuto Sato ◽  
Satoshi Takasu
Keyword(s):  
Plastic Deformation ◽  
Stainless Steel ◽  
Deformation Zone ◽  
Plastic Deformation Zone

Research of stamping of unequal channel bars. Part 4. Deformed state of the workpiece when extruding channels. 2. Deformations under the punch end

2021 ◽  
pp. 53-57
Author(s):  
A.L. Vorontsov
Keyword(s):  
Plastic Deformation ◽  
Plane Strain ◽  
Deformation Zone ◽  
Plastic Deformation Zone ◽  
Die Forging ◽  
Deformed State

Determination of the deformed state of the workpiece at free extrusion of channels is considered. Formulas are obtained for determining the accumulated deformations at a given point of the plastic deformation zone and extruded walls of the product for any punch working stroke. Keywords: die forging, extrusion, misalignment, punch, matrix, plane strain, accumulated deformations, hardening. [email protected]

Nanoindentation Characterization of Single-Crystal Silicon With Oxide Film

2021 ◽  
Author(s):  
Lianmin Yin ◽  
Yifan Dai ◽  
Hao Hu
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Oxide Film ◽  
Single Crystal ◽  
Deformation Zone ◽  
Single Crystal Silicon ◽  
Plastic Deformation Zone ◽  
Crystal Silicon ◽  
Ultra Precision

Abstract In order to obtain ultra-smooth surfaces of single-crystal silicon in ultra-precision machining, an accurate study of the deformation mechanism, mechanical properties, and the effect of oxide film under load is required. The mechanical properties of single-crystal silicon and the phase transition after nanoindentation experiments are investigated by nanoindentation and Raman spectroscopy, respectively. It is found that pop-in events appear in the theoretical elastic domain of single-crystal silicon due to the presence of oxide films, which directly leads the single crystal silicon from the elastic deformation zone into the plastic deformation zone. In addition, the mechanical properties of single-crystal silicon are more accurately measured after it has entered the full plastic deformation.

Study of a modified ECAP die for producing nanostructured Al6060 alloy using 3D finite element simulation

2016 ◽  
Vol 1818 ◽  
Author(s):  
M. A. González-Lozano ◽  
P. Ponce-Peña ◽  
M.A. Escobedo-Bretado ◽  
R.H. Lara-Castro ◽  
B. X. Ochoa-Salazar
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Severe Plastic Deformation ◽  
Tensile Stress ◽  
Deformation Zone ◽  
Plastic Deformation Zone ◽  
Element Analysis ◽  
Ecap Processing ◽  
Angular Pressing ◽  
Element Simulation

ABSTRACTUsing Finite Element Method (FEM) simulations is possible to study the homogeneity of deformation in the Equal Channel Angular Pressing (ECAP) process. In this work an investigation about the influence of a modified die on strain distribution in an ecaped Al6060 alloy was carried out. Due to that, tensile stress occurs in the vicinity of upper surface of the specimen in the severe plastic deformation zone, which increases the cracking and fracture tendency of the specimen and impedes further ECAP processing, the conventional ECAP die was modified to eliminate the tensile stress and enhance the compressive stress in the severe plastic deformation zone and reducing the cracking and fracture tendency of the specimen. Finite element analysis demonstrated that the stress state changes from tensile to strongly compressive when using the modified die. The aim of this study is to evaluate the advantages/disadvantages of the modified ECAP die and processing conditions.

OBSERVATION OF PLASTIC DEFORMATION ZONE WITH ACOUSTIC MICROSCOPE

1988 ◽  
Vol 4 (2-3) ◽  
pp. 55-55 ◽  
Author(s):  
Isao ISHIKAWA ◽  
Hiroshi KANDA ◽  
Kageyoshi KATAKURA ◽  
Takuya SENBA ◽  
Yasuhiro TANI ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Deformation Zone ◽  
Plastic Deformation Zone ◽  
Acoustic Microscope

Plastic Deformation Zone Size during Indenter Scratch Tests of Materials

2020 ◽  
Vol 2020 (10) ◽  
pp. 1218-1221
Author(s):  
A. Yu. Marchenkov ◽  
D. V. Chernov ◽  
D. A. Zhgut ◽  
E. V. Terent’ev ◽  
N. Abusaif
Keyword(s):  
Plastic Deformation ◽  
Deformation Zone ◽  
Plastic Deformation Zone ◽  
Zone Size ◽  
Scratch Tests

scholarly journals Topology Optimization of Elastoplastic Behavior Conditions by Selectively Suppressing Plastic Work

Mathematics ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 2062
Author(s):  
Eun-Ho Lee ◽  
Tae-Hyun Kim
Keyword(s):  
Plastic Deformation ◽  
Topology Optimization ◽  
Elastic Deformation ◽  
Deformation Zone ◽  
Strain Energy ◽  
Optimization Problems ◽  
Elastic Stiffness ◽  
Plastic Work ◽  
Plastic Deformation Zone ◽  
Element Analysis

This work conducted topology optimization with an implicit analysis of elastoplastic constitutive equation in order to design supporting structures for unexpected heavy loading conditions. In this topology optimization model, plastic work was extracted from strain energy and selectively employed in the objective function according to deformation mode. While strain energy was minimized in elastic deformation areas, in elastoplastic deformation areas, the plastic work was minimized for the purpose of suppressing plastic deformation. This method can focus on suppressing plastic strain in the plastic deformation zone with maintaining elastic stiffness in the elastic deformation zone. These formulations were implemented into MATLAB and applied to three optimization problems. The elastoplastic optimization results were compared to pure elastic design results. The comparison showed that structures designed with accounting for plastic deformation had a reinforced area where plastic deformation occurs. Finally, a finite element analysis was conducted to compare the mechanical performances of structures with respect to the design method.

STUDY OF PLASTIC DEFORMATION ZONE SIZES DURING MATERIAL SCRATCH TEST

2020 ◽  
pp. 41-44
Author(s):  
A. Yu. Marchenkov ◽  
◽  
D.V. Chernov ◽  
D.A. Zhgut ◽  
E.V. Terentyev ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Deformation Zone ◽  
Scratch Test ◽  
Plastic Deformation Zone
Sign in / Sign up

Export Citation Format

Share Document