Cumulative contribution of grain structure and twin boundaries on cyclic deformation behavior of a 20Mn-0.6C- TWIP steel: Experimental and theoretical analysis

2019 ◽  
Vol 767 ◽  
pp. 138415 ◽  
Author(s):  
Y. Chen ◽  
Y.J. Luo ◽  
Y.F. Shen ◽  
Y. Liu ◽  
R.D.K. Misra
Keyword(s):  
Theoretical Analysis ◽  
Cyclic Deformation ◽  
Deformation Behavior ◽  
Twip Steel ◽  
Grain Structure ◽  
Twin Boundaries

Tensile deformation behavior of Fe–Mn–C TWIP steel with ultrafine elongated grain structure

2012 ◽  
Vol 75 ◽  
pp. 169-171 ◽  
Author(s):  
Taekyung Lee ◽  
Motomichi Koyama ◽  
Kaneaki Tsuzaki ◽  
You-Hwan Lee ◽  
Chong Soo Lee
Keyword(s):  
Deformation Behavior ◽  
Twip Steel ◽  
Tensile Deformation ◽  
Grain Structure ◽  
Tensile Deformation Behavior

scholarly journals Surface Morphology and Its Influence on Cyclic Deformation Behavior of High-Mn TWIP Steel

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 832 ◽  
Author(s):  
Matthias Klein ◽  
Marek Smaga ◽  
Tilmann Beck
Keyword(s):  
Surface Morphology ◽  
Cyclic Deformation ◽  
Deformation Behavior ◽  
Focused Ion Beam ◽  
Twip Steel ◽  
Low Cycle Fatigue ◽  
Ion Beam ◽  
Fatigue Tests ◽  
Cyclic Plasticity ◽  
Cycle Fatigue

In this study, the dependence of the cyclic deformation behavior on the surface morphology of metastable austenitic HSD® 600 TWinning Induced Plasticity (TWIP) steel was investigated. This steel—with the alloying concept Mn-Al-Si—shows a fully austenitic microstructure with deformation-induced twinning at ambient temperature. Four different surface morphologies were analyzed: as-received with a so-called rolling skin, after up milling, after down milling, and a reference morphology achieved by polishing. The morphologies were characterized by X-Ray Diffraction (XRD), Focused Ion Beam (FIB), Scanning Electron Microscopy (SEM) as well as confocal microscopy methods and show significant differences in initial residual stresses, phase fractions, topographies and microstructures. For specimens with all variants of the morphologies, fatigue tests were performed in the Low Cycle Fatigue (LCF) and High Cycle Fatigue (HCF) regime to characterize the cyclic deformation behavior and fatigue life. Moreover, this study focused on the frequency-dependent self-heating of the specimens caused by cyclic plasticity in the HCF regime. The results show that both surface morphology and specimen temperature have a significant influence on the cyclic deformation behavior of HSD® 600 TWIP steel in the HCF regime.

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.

On the effect of precipitates on the cyclic deformation behavior of an Al–Mg–Si alloy

2017 ◽  
Vol 32 (23) ◽  
pp. 4398-4410 ◽  
Author(s):  
Haichun Jiang ◽  
Stefanie Sandlöbes ◽  
Günter Gottstein ◽  
Sandra Korte-Kerzel
Keyword(s):  
Cyclic Deformation ◽  
Deformation Behavior ◽  
Image Position

Abstract

Cyclic deformation behavior of non-isoaxial copper tricrystals and bicrystals

1999 ◽  
Vol 47 (7) ◽  
pp. 2165-2176 ◽  
Author(s):  
W.P. Jia ◽  
S.X. Li ◽  
Z.G. Wang ◽  
X.W. Li ◽  
G.Y. Li
Keyword(s):  
Cyclic Deformation ◽  
Deformation Behavior

Grain Refinement and Deformation Behavior of Ultrafine Grained Pd and Pd-Ag Alloys Produced by HPT

2008 ◽  
Vol 584-586 ◽  
pp. 182-187
Author(s):  
Lilia Kurmanaeva ◽  
Yulia Ivanisenko ◽  
J. Markmann ◽  
Ruslan Valiev ◽  
Hans Jorg Fecht
Keyword(s):  
Mechanical Properties ◽  
Deformation Behavior ◽  
Materials Science ◽  
High Pressure Torsion ◽  
Uniform Elongation ◽  
Grain Structure ◽  
Coarse Grained ◽  
Ultrafine Grain ◽  
Ultrafine Grained ◽  
Ultrafine Grain Structure

Investigations of mechanical properties of nanocrystalline (nc) materials are still in interest of materials science, because they offer wide application as structural materials thanks to their outstanding mechanical properties. NC materials demonstrate superior hardness and strength as compared with their coarse grained counterparts, but very often they possess a limited ductility or show low uniform elongation due to poor strain hardening ability. Here, we present the results of investigation of the microstructure and mechanical properties of nc Pd and Pd-x%Ag (x=20, 60) alloys. The initially coarse grained Pd-x% Ag samples were processed by high pressure torsion, which resulted in formation of homogenous ultrafine grain structure. The increase of Ag contents led to the decrease of the resulted grain size and change in deformation behavior, because of decreasing of stacking fault energy (SFE). The samples with larger Ag contents demonstrated the higher values of hardness, yield stress and ultimate stress. Remarkably the uniform elongation had also increased with increase of strength.

Cyclic deformation behavior in pure Cu with growth-in twins

2005 ◽  
Vol 405 (1-2) ◽  
pp. 239-245 ◽  
Author(s):  
X.L. Guo ◽  
L. Lu ◽  
S.X. Li
Keyword(s):  
Cyclic Deformation ◽  
Deformation Behavior ◽  
Pure Cu
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