Results 11 to 20 of about 63,565 (197)

Grain refinement in a Cu–Cr–Zr alloy during multidirectional forging [PDF]

Materials Science and Engineering: A, 2014
Abstract Structural changes during plastic deformation were studied in a Cu–0.3%Cr–0.5%Zr alloy subjected to multidirectional forging up to a total strain of 4 at the temperatures of 300 K and 673 K. The deformation behavior was characterized by a rapid increase in the flow stress at an early deformation followed by a steady-state flow at large ...
I. Shakhova, Z. Yanushkevich, I. Fedorova, A. Belyakov, R. Kaibyshev   +4 more
core   +5 more sources

Particle Stimulated Nucleation Effect for Al-Mg-Zr-Sc Alloys with Ni Addition during Multidirectional Forging

Metals, 2023
The study aims to investigate the influence of fraction of coarse undeformed particles on the microstructure evolution and mechanical properties of alloys processed by isothermal multidirectional forging (MDF).
Mikhail S. Kishchik, Andrey G. Mochugovskiy, Maxence Cuda, Anna A. Kishchik, Anastasia V. Mikhaylovskaya   +4 more
doaj   +2 more sources

Low Temperature Superplasticity of Ti-6Al-4V Processed by Warm Multidirectional Forging

Materials Science Forum, 2012
Multidirectional forging has been developed to produce an ultrafine-grain (UFG) microstructure in the two-phase titanium alloy Ti-6Al-4V. A microstructure with a grain size of 135 nm was attained, enabling low-temperature superplasticity (LTSP) at 550°C.
Gennady A. Salishchev, Egor A. Kudryavtsev, Sergey V. Zherebtsov, S. Lee Semiatin   +3 more
core   +4 more sources

Constitutive Model and Microstructure Evolution Finite Element Simulation of Multidirectional Forging for GH4169 Superalloy

Metals, 2020
This study investigates three processes of multidirectional forging (MDF), namely, closed MDF (CMDF), single-open MDF, and double-open MDF, by using a constitutive equation and a dynamic recrystallization model of hot deformation of the GH4169 superalloy.
Yongbo Jin, Chenyang Xi, Peng Xue, Chunxiang Zhang, Sirui Wang, Junting Luo   +5 more
doaj   +2 more sources

Ultrafine Grain Evolution in a Cu-Cr-Zr Alloy during Warm Multidirectional Forging [PDF]

Materials Science Forum, 2014
The microstructure evolution and the deformation behavior of a Cu-0.3%Cr-0.5%Zr alloy subjected to multidirectional forging at a temperature of 673 K under a strain rate of about 10-3 s-1 were studied. Following a rapid increase in the flow stress during straining to about 1, the strain hardening gradually decreases, leading to a steady-state flow ...
Shakhova, I., Belyakov, A., Zhilyaev, A. P., Kaibyshev, R.   +3 more
openaire   +3 more sources

Effect of Pass Strain on Grain Refinement in 7475 Al Alloy during Hot Multidirectional Forging

MATERIALS TRANSACTIONS, 2004
Effect of pass strain (Δɛ) on grain refinement was studied in multidirectional forging (MDF) of a coarse-grained 7475 Al alloy at 490°C under a strain rate of 3 ×10⁻⁴s⁻¹. Results finally in formation of a finer grained structure with an average size of around 7.5 μm at strains of above 3.5, while, the processing with Δɛ = 0.4 develops a slightly ...
Sitdikov O., Sakai T., Goloborodko A., Miura H., Kaibyshev R.   +4 more
openaire   +5 more sources

Microstructure evolution in a 316L stainless steel subjected to multidirectional forging and unidirectional bar rolling [PDF]

IOP Conference Series: Materials Science and Engineering, 2014
The formation of ultrafine-grained structures was studied in a 316L stainless steel during severe plastic deformation. The steel samples were processed up to a total amount of strain of 4 at ambient temperature using two different methods, i.e., multidirectional forging and unidirectional bar rolling.
Odnobokova, M., Kipelova, A., Belyakov, A., Kaibyshev, R.   +3 more
openaire   +3 more sources

Tensile behavior of an austenitic stainless steel subjected to multidirectional forging [PDF]

IOP Conference Series: Materials Science and Engineering, 2014
The mechanical behavior of a chromium -nickel austenitic stainless steel with submicrocrystalline structures produced by multidirectional forging (MDF) to a total strain of ∼ 4 at temperatures of 700 and 600° C was studied. This processing resulted in the formation of uniform ultrafine grained structure with an average crystallite size of 360 and 300 ...
Tikhonova, M., Sorokopudova, J., Bondareva, E., Belyakov, A., Kaibyshev, R.   +4 more
openaire   +3 more sources

Strength and Superplasticity of AA 7075 Aluminum Alloy Fabricated By Multidirectional Forging

Acta Mechanica et Automatica
Abstract This study explores the influence of multidirectional forging (MDF) on the mechanical strength and superplastic behavior of AA7075 aluminum alloy. The material, initially processed by hot extrusion, underwent severe plastic deformation (SPD) through MDF.
Manh Hung LE, Manh Tien NGUYEN, Truong An NGUYEN   +2 more
openaire   +2 more sources

High Strain Rate Quasi-Superplasticity Behavior in an Ultralight Mg-9.55Li-2.92Al-0.027Y-0.026Mn Alloy Fabricated by Multidirectional Forging and Asymmetrical Rolling. [PDF]

Materials (Basel), 2022
To explore new approaches to severe plastic deformation and the ductility of a multicomponent magnesium–lithium alloy, an ultralight microduplex Mg-9.55Li-2.92Al-0.027Y-0.026Mn alloy was made by novel multidirectional forging and asymmetrical ...
Cao F, Shang H, Guo N, Kong S, Liu R.
europepmc   +2 more sources