Kinetics of plastic deformation zone development in fatigue failure of 20 steel

1983 ◽  
Vol 19 (1) ◽  
pp. 30-34
Author(s):  
L. R. Botvina ◽  
G. V. Klevtsov
Keyword(s):  
Plastic Deformation ◽  
Fatigue Failure ◽  
Deformation Zone ◽  
Plastic Deformation Zone ◽  
Zone Development ◽  
Kinetics Of

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.

Kinetics of zones of plastic deformation in fatigue failure

1992 ◽  
Vol 28 (5) ◽  
pp. 436-441
Author(s):  
S. V. Safronov ◽  
D. A. Molodov ◽  
B. M. Sakulin
Keyword(s):  
Plastic Deformation ◽  
Fatigue Failure ◽  
Kinetics Of

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
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