Texture development in Fe–3.0mass% Si during high-temperature deformation: Examination of the preferential dynamic grain growth mechanism

2013 ◽  
Vol 61 (4) ◽  
pp. 1294-1302 ◽  
Author(s):  
Yusuke Onuki ◽  
Ryosuke Hongo ◽  
Kazuto Okayasu ◽  
Hiroshi Fukutomi
Keyword(s):  
High Temperature ◽  
Grain Growth ◽  
Growth Mechanism ◽  
Texture Development ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Dynamic Grain Growth

Superplasticity in CP-Titanium Alloys

2007 ◽  
Vol 551-552 ◽  
pp. 373-378 ◽  
Author(s):  
X.J. Zhu ◽  
Ming Jen Tan ◽  
K.M. Liew
Keyword(s):  
High Temperature ◽  
Grain Growth ◽  
Initial Strain Rate ◽  
Tensile Tests ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Uniaxial Tensile ◽  
Step Method ◽  
Commercially Pure ◽  
Effects Of Temperature

In this work, studies were carried out to investigate the superplasticity of a commercially pure (CP) titanium alloy during high temperature deformation. Uniaxial tensile tests were carried out at 600, 750 and 800°C with an initial strain rate from 10-1s-1 to 10-4s-1. It was found that the alloy do not show good superplasticity due fast grain growth at high temperature and cavity. The effects of temperature on the grain growth and cavity phenomena as well as the dynamic recrystallization of the alloy were studied and a ‘two-step-method’ was introduced to increase the superplasticity of the alloy.

Creep characteristics of alumina, nickel aluminate spinel, zirconia composites

2008 ◽  
Vol 23 (2) ◽  
pp. 556-564 ◽  
Author(s):  
R. Peter Dillon ◽  
Dong-Kyu Kim ◽  
Joy E. Trujillo ◽  
Waltraud M. Kriven ◽  
Martha L. Mecartney
Keyword(s):  
High Temperature ◽  
Grain Growth ◽  
Mechanical Stability ◽  
True Strain ◽  
Tetragonal Zirconia ◽  
Ceramic Composites ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Nickel Aluminate ◽  
Three Phase

Fine grained, three-phase ceramic composites that exhibit favorable toughness, hardness, and high room-temperature strength were evaluated for high-temperature mechanical stability. A 50vol%Al2O3–25vol%NiAl2O4–25vol%3 mol%yttria-stabilized tetragonal zirconia polycrystal (3Y–TZP) and a 33vol%Al2O3–33vol%NiAl2O4–33vol%3Y-TZP composite were compression creep tested at temperatures between 1350 and 1450 °C under constant stresses of 20–45 MPa. The three-phase microstructure effectively limited grain growth (average d0 = 1.3 μm, average df = 1.6 μm after 65% true strain). True strain rates were 10−4 to 10−6 s−1 with stress exponents n = 1.7 to 1.8 and a grain-size exponent p = 1.3. A method for compensating for grain growth is presented using stress jump tests. The apparent activation energy for high-temperature deformation for 50vol%Al2O3–25vol%NiAl2O4–25vol%3Y–TZP was found to be 373 kJ/mol-K.

scholarly journals Effects of MnO-Al2O3on the Grain Growth and High-Temperature Deformation Strain of UO2Fuel Pellets

2010 ◽  
Vol 47 (3) ◽  
pp. 304-307 ◽  
Author(s):  
Ki Won KANG ◽  
Jae Ho YANG ◽  
Jong Hun KIM ◽  
Young Woo RHEE ◽  
Dong Joo KIM ◽  
...  
Keyword(s):  
High Temperature ◽  
Grain Growth ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Deformation Strain

Densification and High Temperature Deformation in Oxide Ceramics

2008 ◽  
Vol 395 ◽  
pp. 39-54 ◽  
Author(s):  
Atul H. Chokshi
Keyword(s):  
High Temperature ◽  
Grain Growth ◽  
Diffusion Processes ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Oxide Ceramics ◽  
Deformation And Failure ◽  
Kinetics Of

Bulk ceramics are usually obtained from sintering of powders, involving both densification and growth. The kinetics of grain growth are examined with a view to producing bulk nanoceramics. The high temperature deformation and failure of oxide ceramics are also examined with reference to diffusion processes.

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