Influence of Deformation Temperature on the Effect of High Plasticity Implementation in Ultrafine-Grained Al–1.5Cu Alloy

2021 ◽  
Author(s):  
A. M. Mavlyutov ◽  
T. S. Orlova ◽  
E. Kh. Yapparova ◽  
N. A. Enikeev ◽  
M. Yu. Murashkin
Keyword(s):  
Deformation Temperature ◽  
High Plasticity ◽  
Ultrafine Grained

Micro-Embossing Process in Ultrafine-Grained Pure Aluminum Processed by Equal-Channel Angular Pressing with Elevated Temperature

2019 ◽  
Vol 821 ◽  
pp. 244-249
Author(s):  
Qian Su ◽  
Jie Xu ◽  
Lei Shi ◽  
De Bin Shan ◽  
Bin Guo
Keyword(s):  
Equal Channel Angular Pressing ◽  
Deformation Temperature ◽  
Pure Aluminum ◽  
Confocal Scanning Laser Microscopy ◽  
Electron Backscattered Diffraction ◽  
Angular Pressing ◽  
Ultrafine Grained ◽  
Scanning Laser Microscopy ◽  
Confocal Scanning ◽  
Confocal Scanning Laser

Micro-embossing tests were performed on ultrafine-grained pure Al processed by equal-channel angular pressing (ECAP) with 100 μm width of female die at different deformation temperature ranging from 298 K to 523 K under a force of 5 kN. The filling height, surface topography and microstructure of the cross section were measured by confocal scanning laser microscopy (CSLM), scanning electron microscopy (SEM) and electron backscattered diffraction (EBSD), respectively. The effects of deformation temperature on formability of ultrafine-grained (UFG) pure Al during micro-embossing were analyzed. The results show that increase in deformation temperature can improve the formability of UFG pure Al on micro-embossing. Micro hot embossing of UFG pure aluminum is characterized by the rib sidewall, surface quality, and fully transferred patterns, which shows ultrafine-grained pure Al has potential application in micro-forming.

Deformation behavior of a high-plasticity nano/ultrafine-grained N-bearing duplex stainless steel: Twin/twin-like induced plasticity effect

2017 ◽  
Vol 700 ◽  
pp. 637-640 ◽  
Author(s):  
Mohammad Moallemi ◽  
Abbas Zarei-Hanzaki ◽  
Sung-Joon Kim ◽  
Changwan Hong ◽  
Pooriya Dastranjy Nezhadfar
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Deformation Behavior ◽  
High Plasticity ◽  
Plasticity Effect ◽  
Ultrafine Grained

Effect of the severe plastic deformation temperature on the diffusion properties of the grain boundaries in ultrafine-grained metals

2017 ◽  
Vol 2017 (5) ◽  
pp. 413-425 ◽  
Author(s):  
V. N. Chuvil’deev ◽  
M. M. Myshlyaev ◽  
A. V. Nokhrin ◽  
V. I. Kopylov ◽  
Yu. G. Lopatin ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Grain Boundaries ◽  
Deformation Temperature ◽  
Ultrafine Grained ◽  
Diffusion Properties

Deformation and Failure of Ultrafine-Grained Cu at Subambient Temperature

2017 ◽  
Vol 891 ◽  
pp. 249-253
Author(s):  
Alena Juríková ◽  
Kornel Csach ◽  
Jozef Miškuf ◽  
Mária Huráková ◽  
Elena D. Tabachnikova ◽  
...  
Keyword(s):  
Failure Process ◽  
Ductile Failure ◽  
Tensile Tests ◽  
Uniaxial Tensile ◽  
High Plasticity ◽  
Pressing Method ◽  
Deformation And Failure ◽  
Angular Pressing ◽  
Ultrafine Grained ◽  
Subambient Temperature

The ultrafine-grained copper was obtained by 12 passes of equal-channel angular pressing method. The uniaxial tensile tests at room temperature and the subambient temperature of 77 K show that the yield stress increases from the value of 128 MPa to the value of 138 MPa, respectively. In addition, the lowering the test temperature tends to the increase of the deformation before the failure. The fractographic analysis shows the transcrystalline ductile failure for all samples. Due to the high plasticity of nanostructured copper no influence of the nanoporosity on the failure process was observed.

High Z - Large Strain Deformation Processing and Its Applications

2006 ◽  
Vol 503-504 ◽  
pp. 329-334 ◽  
Author(s):  
Shiro Torizuka ◽  
Akio Ohmori ◽  
S.V.S. Narayana Murty ◽  
Kotobu Nagai
Keyword(s):  
Deformation Temperature ◽  
Large Strain ◽  
Empirical Relation ◽  
Compression Tests ◽  
Compression Technique ◽  
Hollomon Parameter ◽  
Ultrafine Grained ◽  
Isothermal Plane ◽  
Simple Compression ◽  
Mn Steel

Ultrafine-grained structures formed dynamically through simple compression at warm deformation temperatures were investigated in a 0.15%C- 0.4%Si-1.5%Mn steel. The effects of strain, strain rate and deformation temperature on the microstructural evolution were examined using an isothermal plane strain compression technique with a pair of anvils. The maximum strain was 4, the deformation temperature was below the AC1 temperature, and the Zener-Hollomon parameter (Z) ranged between 1012 s-1 and 1016 s-1. Ultrafine ferrite grains surrounded by high angle boundaries are generated by simple compression when the strain exceeded a critical value. The number of newly generated ultrafine grains increased with the strain; however, the average sizes were found to be independent of strain. The grain size, `d`, was found to depend on Z parameter. An equation, d (μm) =102.07Z-0.16, was found to satisfy the experimentally obtained data. This study demonstrates the possibility of obtaining ultrafine ferrite through multi-pass caliber rolling as a high Z- large strain deformation technique for producing bulk engineering components. It was also noted that the empirical relation established based on single pass compression tests is valid for multi-pass caliber rolling.

Research on Microstructure Evolution Laws of Ultrafine Grained Metastable Automobile Steel

2013 ◽  
Vol 423-426 ◽  
pp. 281-285
Author(s):  
Ji Guang Li ◽  
Hai Liang Huang ◽  
Shang Wu Zeng ◽  
Jia Li Cao ◽  
Tie Jun Wang
Keyword(s):  
Microstructure Evolution ◽  
Retained Austenite ◽  
Large Fraction ◽  
Lath Martensite ◽  
High Strength ◽  
Ultrafine Grain ◽  
High Plasticity ◽  
Ultrafine Grained ◽  
The Matrix ◽  
Evolution Laws

The microstructure evolution laws of ultrafine grained metastable automobile steels was studied in this paper by laser confocal scanning microscope, EBSD, XRD and TEM. Results showed that, the matrix organizations of hot-rolled steel were lath martensite and deformation ferrite, and there were a little of retained austenite film and lath between the lath martensite. After heat treatment, the matrix organizations of steel were ultrafine ferrite and retained austenite. The retained austenite transformed into martensite and ε-martensitic in the deformation process, and the strength and plasticity of steel were improved. A lot of retained austenite were obtained in the annealing process. The TRIP effects by the large fraction of metastable austenite and the ultrafine grain size add to the test steel with high strength and high plasticity.

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