Plastic Strain Ratio of Warm and Hot Asymmetrically Rolled AA6061 Al Sheet

2017 ◽  
Vol 873 ◽  
pp. 60-64 ◽  
Author(s):  
In Soo Kim ◽  
Su Kwon Nam ◽  
Dong Nyung Lee
Keyword(s):  
Plastic Strain ◽  
Strain Ratio ◽  
Orientation Distribution ◽  
Alloy Sheet ◽  
Al Alloy ◽  
Asymmetric Rolling ◽  
Plastic Strain Ratio ◽  
X Ray ◽  
Heat Treated ◽  
Pole Figures

AA6061 Al alloy sheet was prepared by warm and hot asymmetric rolling at the temperature from 200 to 600°C. Pole figures of warm and hot asymmetric rolled AA6061 Al sheets were measured by X-ray diffractometer (XRD). Orientation distribution function (ODF) and the plastic strain ratio (R-value) were calculated. The calculated plastic strain ratio of starting sample was compared with those of different temperature warm and hot asymmetrically rolled samples. The plastic strain ratios of warm and hot asymmetrically rolled under different temperature and subsequently heat treated AA6061 Al sheets were shown higher than that of starting sample, but ΔRvalues expect 600°C were lower than that of starting sample.

Improvement in Plastic Strain Ratio of AA1050 Al Alloy Sheet by Enhancing the <111>//ND Texture Component

2016 ◽  
Vol 835 ◽  
pp. 203-209 ◽  
Author(s):  
Su Kwon Nam ◽  
In Soo Kim ◽  
Dong Nyung Lee
Keyword(s):  
Plastic Strain ◽  
Anisotropy Parameter ◽  
Strain Ratio ◽  
Alloy Sheet ◽  
Subsequent Annealing ◽  
Al Alloy ◽  
Asymmetric Rolling ◽  
Plastic Strain Ratio ◽  
R Value ◽  
Average Plastic Strain Ratio

The average plastic strain ratio (the R-value) and the anisotropy parameter |ΔR| calculated from the measured texture of AA1050 Al alloy sheet treated by the heavy asymmetric rolling by 84% reduction in thickness and subsequent annealing for 1 h at 500 °C, followed by light rolling by 10% or 20% reduction in thickness and the subsequent annealing for 1 h at 500 °C increased by 1.52 times that of the non-processed specimen and reduced to 1/12 times that of the non-processed specimen, respectively.

A process for increasing plastic strain ratio of AA1050 Al alloy sheet

2017 ◽  
Vol 54 (1/2/3) ◽  
pp. 202 ◽  
Author(s):  
Gwang Hee Kim ◽  
Su Kwon Nam ◽  
Dong Nyung Lee ◽  
Insoo Kim
Keyword(s):  
Plastic Strain ◽  
Strain Ratio ◽  
Alloy Sheet ◽  
Al Alloy ◽  
Plastic Strain Ratio

A process for increasing plastic strain ratio of AA1050 Al alloy sheet

2017 ◽  
Vol 54 (1/2/3) ◽  
pp. 202
Author(s):  
Insoo Kim ◽  
Dong Nyung Lee ◽  
Su Kwon Nam ◽  
Gwang Hee Kim
Keyword(s):  
Plastic Strain ◽  
Strain Ratio ◽  
Alloy Sheet ◽  
Al Alloy ◽  
Plastic Strain Ratio

TEXTURE AND FORMABILITY DEVELOPMENT OF ASYMMETRY ROLLED AA 3003 AL ALLOY SHEET

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5895-5900 ◽  
Author(s):  
INSOO KIM ◽  
SAIDMUROD AKRAMOV ◽  
HAE BONG JEONG
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Plastic Strain ◽  
Research Work ◽  
Heat Treating ◽  
Alloy Sheet ◽  
Al Alloy ◽  
Fine Grain ◽  
Heat Treated ◽  
Crystallographic Orientations

The physical, mechanical properties and formability of sheet metal depend on preferred crystallographic orientations (texture). In this research work, we investigated texture development and formability of AA 3003 aluminum alloy sheets after asymmetry rolling and subsequent heat treatment. After asymmetry rolling, the specimens showed fine grain size. We also investigated the change of the plastic strain ratios after asymmetry rolling and subsequent heat-treating condition. The plastic strain ratios of asymmetrically rolled and subsequent heat treated samples are 1.5 times higher than the initial AA 3003 Al alloy sheets. These could be attributed to the formation of ND//<111> texture component through asymmetry rolling in Al sheet.

TEXTURE DEVELOPMENT AND DRAWABILITY OF FRICTIONALLY ROLLED AA 5052 AL ALLOY SHEET

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5931-5936 ◽  
Author(s):  
INSOO KIM ◽  
SAIDMUROD AKRAMOV ◽  
HAE BONG JEONG ◽  
TAE KYOUNG NO
Keyword(s):  
Heat Treatment ◽  
Grain Size ◽  
Texture Component ◽  
Alloy Sheet ◽  
Al Alloy ◽  
X Ray ◽  
Fine Grain ◽  
Tensile Tester ◽  
Heat Treated ◽  
R Value

The microstructure, pole figure and r -value of the frictionally rolled and subsequently heat treated AA 5052 Al sheets were investigated by optical microscopy, x-ray diffractometer and tensile tester, respectively. Frictionally rolled AA 5052 Al specimens showed a fine grain size. After subsequently heat treated specimens, the ND//<111> texture component was increased. The r -values of the frictionally rolled and subsequently heat treated Al alloy sheets were about two times higher than those of the original Al sheets. These could be related to the formation of ND//<111> texture components through frictional rolling in and subsequent heat treatment of AA 5052 Al sheet.

scholarly journals Texture analysis with a time-of-flight neutron strain scanner

2014 ◽  
Vol 47 (4) ◽  
pp. 1337-1354 ◽  
Author(s):  
Florencia Malamud ◽  
Javier R. Santisteban ◽  
Miguel Angel Vicente Alvarez ◽  
Raúl Bolmaro ◽  
Joe Kelleher ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Rolling Direction ◽  
Time Of Flight ◽  
Orientation Distribution ◽  
Al Alloy ◽  
X Ray ◽  
Pole Figures ◽  
Transmission Measurements ◽  
The Uk ◽  
Zr Alloys

A time-of-flight (TOF) neutron strain scanner is a white-beam instrument optimized to measure diffractograms at precise locations within bulky specimens, typically along two perpendicular sample orientations. Here, a method is proposed that exploits the spatial resolution (∼1 mm) provided by such an instrument to determine in a nondestructive manner the crystallographic texture at selected locations within a macroscopic object. The method is based on defining the orientation distribution function (ODF) of the crystallites from several incomplete pole figures, and it has been implemented on ENGIN-X, a neutron strain scanner at the ISIS facility in the UK. This method has been applied to determine the texture at different locations of Al alloy plates welded along the rolling direction and to study a Zr2.5%Nb pressure tube produced for a CANDU nuclear power plant. For benchmarking, the results obtained with this instrument for samples of ferritic steel, copper, Al alloys and Zr alloys have been compared with measurements performed using conventional X-ray diffractometers and more established neutron techniques. For cases where pole figure coverage is incomplete, the use of TOF neutron transmission measurements simultaneously performed on the specimens is proposed as a simple and powerful test to validate the resulting ODF.

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