Influence of grain size on high-temperature deformation of ?-Ti-Al alloys

1988 ◽  
Vol 7 (9) ◽  
pp. 987-988 ◽  
Author(s):  
Hiroshi Oikawa ◽  
Katsunari Sasaki ◽  
Akihiro Sagara ◽  
Kouichi Maruyama
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Al Alloys ◽  
High Temperature Deformation ◽  
Temperature Deformation

Comparison of High-Temperature Compressive Deformation Characteristics of Differently Processed LY12 Aluminum Alloys

2010 ◽  
Vol 667-669 ◽  
pp. 845-849
Author(s):  
Yao Wang ◽  
Qing Wei Jiang ◽  
Ying Wu ◽  
Xiao Wu Li
Keyword(s):  
High Temperature ◽  
Surface Deformation ◽  
Testing Temperature ◽  
Al Alloys ◽  
Compressive Deformation ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Al Alloy ◽  
Damage Characteristics ◽  
Angular Pressing

The individual or joint effects of annealing and equal channel angular pressing (ECAP) treatments on the high-temperature compressive deformation and damage behavior of cast LY12 Al alloys were studied. The compressive deformation behavior and surface deformation and damage characteristics of differently treated LY12 Al alloy samples were examined at temperatures ranging from 25°C to 400°C. It is found that the LY12 Al alloy exhibits different compressive mechanical behavior depending on different treatments, and the compressive deformation and damage characteristics of LY12 Al alloys with different microstructural states are closely related with the testing temperature. As compared to other samples (e.g. as-cast, annealed, as-cast+2ECAPed), the sample annealed at 450°C for 3h followed by ECAPed for 2 passages (i.e. annealed+2ECAPed) shows a better high-temperature deformation stability.

scholarly journals Effect of Annealing on Structure and Mechanical Behavior of an AA2139 Alloy

2014 ◽  
Vol 783-786 ◽  
pp. 258-263 ◽  
Author(s):  
Damir Tagirov ◽  
Daria Zhemchuzhnikova ◽  
Marat Gazizov ◽  
Rustam Kaibyshev
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Flow Stress ◽  
Room Temperature ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Aged Alloy ◽  
Coarse Particles ◽  
Initial Material ◽  
High Ductility

An AA2139 alloy with a chemical composition of Al–4.35Cu-0.46%Mg–0.63Ag-0.36Mn–0.12Ti (in wt.%) and an initial grain size of about 155 μm was subjected to annealing at 430°C for 3 h followed by furnace cooling. This treatment resulted in the formation of a dispersion of coarse particles having essentially plate-like shape. The over-aged alloy exhibits lower flow stress and high ductility in comparison with initial material in the temperature interval 20-450°C. Examination of microstructural evolution during high-temperature deformation showed localization of plastic flow in vicinity of coarse particles. Over-aging leads to transition from ductile-brittle fracture to ductile and very homogeneous ductile fracture at room temperature.

The high-temperature deformation and tensile ductility of Al alloys

JOM ◽  
1999 ◽  
Vol 51 (1) ◽  
pp. 34-36 ◽  
Author(s):  
Eric M. Taleff ◽  
Peter J. Nevland
Keyword(s):  
High Temperature ◽  
Tensile Ductility ◽  
Al Alloys ◽  
High Temperature Deformation ◽  
Temperature Deformation

Effects of grain size on high temperature deformation behavior of Al–4Mg–0.4Sc alloy

2003 ◽  
Vol 57 (13-14) ◽  
pp. 1903-1909 ◽  
Author(s):  
Kee-Do Woo ◽  
Sug-Won Kim ◽  
Chang-Ho Yang ◽  
Tai Ping Lou ◽  
Yasuhiro Miura
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Deformation Behavior ◽  
High Temperature Deformation ◽  
Temperature Deformation

A Constitutive Equation Coupling the Grain Size during the High Temperature Deformation of Ti-6.62Al-5.14Sn-1.82Zr Alloy

2007 ◽  
Vol 561-565 ◽  
pp. 155-158 ◽  
Author(s):  
Jiao Luo ◽  
Miao Quan Li ◽  
Y.Q. Hu
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Flow Stress ◽  
Constitutive Equation ◽  
Steady Flow ◽  
Maximum Error ◽  
High Temperature Deformation ◽  
Temperature Deformation ◽  
Stress Model ◽  
Flow Stress Model

A constitutive equation has been established to describe the effect of grain size on the deformation behavior of Ti-6.62Al-5.14Sn-1.82Zr alloy during the high temperature. In this paper, firstly a steady flow stress model is proposed, and a function relating to the grain size is introduced to modify the steady flow stress model. Meanwhile, a microstructure model established by the fuzzy neural network method is applied to calculate the grain size of prior α phase during the high temperature deformation of Ti-6.62Al-5.14Sn-1.82Zr alloy. The calculated flow stress using the present constitutive equation shows a good agreement with the experimental flow stress of the Ti-6.62Al-5.14Sn-1.82Zr alloy. The relative maximum error was not more than 15%.

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