Texture softening and strain instability in F.C.C. metals: Plane-strain deformation

1987-9
Öztürk, Tayfur
Davies, Gwilym J. G
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
189
views
0
downloads
An analysis was carried out into texture induced softening and the resulting strain instability in plane-strain deformation. A macroscopic model was employed in the analysis which viewed the deformation as the juxtaposition of suitably disposed positive and negative simple shears. With this model, the textural contribution to the rate of deformation hardening was computed in terms of a texture softening factor, S, this in a form that could readily be incorporated into the relevant conditions for strain instability. Maps were obtained which show the orientation dependence of texture softening factor and the geometry of the macroscopic shear. The former can be used to assess the susceptibility of a textured f.c.c. metal (or a single crystal) for strain instability, and the latter can be used to predict the geometry of shear bands resulting from the instability.
Metallurgy & Metallurgical Engineering
https://hdl.handle.net/11511/51982
Acta Metallurgica
Department of Metallurgical and Materials Engineering, Article

Suggestions

Thermal analysis of eutectic modified and grain refined aluminum-silicon alloys
İslamoğlu, H. Erol; Kalkanlı, Ali; Department of Metallurgical and Materials Engineering (2005)
A series of AlSi9Mg alloys were prepared and tested to reveal the effect of addition sequence and timing of grain refiner and eutectic modifier. AlSr10 master alloy was used as an modification reagent, and also for grain refiner AlTi5B master alloy was used. The depression at the eutectic temperature due to the addition of modifier and decrease in the amount of undercooling at the liquidus due to the presence of grain refiner were examined by the cooling curves which were obtained by the Alu-Therm instrumen...
Investigation of the effect of orientation and heat treatment on the stress corrosion cracking susceptibility of 7050 aluminium alloy
Çevik, Gül; Doruk, Mustafa; Department of Metallurgical and Materials Engineering (2004)
In the present work, the effect of variation in specimen orientation and heat treatment on the Stress Corrosion Cracking (SCC) susceptibility of 7050 aluminum alloy was investigated in 3,5% NaCl solution and under freely corroding conditions. For this purpose, Constant Extension Rate Tests (CERT) was performed on precracked Compact Tension (CT) specimens and the Direct Current Potential Drop technique was applied to measure the crack lengths. In addition to crack length versus time curves, the relationship ...
Optimization of conditions in sulfuric acid leaching of Turkish chromite concentrates
Ustaoğlu, Emre; Geveci, Ahmet; Department of Metallurgical and Materials Engineering (2006)
In this thesis work, a high grade chromite concentrate obtained from Pınarbaşı, Kayseri region of Turkey was reacted with sulfuric acid solution to determine the optimum conditions of leaching of chromite ores. Conventional methods for producing chromium are still valid in industry. The main process in production includes soda melting and taking it into solution in the form of chemical compounds such as sodium dichromate. Three and six valence states of chromium have importance in production. Trivalent chro...
Experimental investigation of residual stresses introduced via shot peening and their effect on fatigue life of ball bearings
Küçükyılmaz, Ali; Gür, Cemil Hakan; Department of Metallurgical and Materials Engineering (2010)
In this study, residual stresses introduced via application of shot peening on the raceways of bearing rings and their effect on the fatigue life was investigated experimentally. For improvement of residual compressive stress state, shot peening operation with different parameters was utilized. Residual stress measurements were conducted via X-ray diffraction technique. Optimization of residual stress state during the production of ball bearings is the main target of this study. Process parameters for shot ...
Experimental investigation of the agitation of complex fluids
Yazıcıoğlu, Özge; Uludağ, Yusuf; Department of Chemical Engineering (2006)
In this study, agitation of solutions using different impeller and tank geometry were investigated experimentally in terms of hydrodynamics, macromixing time and aeration characteristics. In the first set of experiments a cylindrical vessel equipped with two types of hydrofoil and a hyperboloid impeller or their combinations were used. Vessel and impeller diameters and water level were 300, 100 and 300 mm, respectively. At the same specific power consumption, 163 W/m3, the so called “hydrofoil 1” impeller p...
Citation Formats
T. Öztürk and G. J. G. Davies, “Texture softening and strain instability in F.C.C. metals: Plane-strain deformation,” Acta Metallurgica, pp. 2307–2314, 1987, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51982.
METU IIS - Integrated Information Service open@metu.edu.tr