Phase transformation behaviors of Ti-50.9 at.% Ni alloy after Equal Channel Angular Extrusion

2008 ◽  
Vol 62 (6-7) ◽  
pp. 800-803 ◽  
Author(s):  
Zhiguo Fan ◽  
Chaoying Xie
Keyword(s):  
Phase Transformation ◽  
Equal Channel Angular Extrusion ◽  
Ni Alloy ◽  
Angular Extrusion

Microstructures and Phase Transformations of Ti-50.9at%Ni Alloy Processed by Equal Channel Angular Extrusion at Medium Temperature

2007 ◽  
Vol 561-565 ◽  
pp. 877-880 ◽  
Author(s):  
Chao Ying Xie ◽  
Zhi Guo Fan
Keyword(s):  
Phase Transformation ◽  
Phase Transformations ◽  
Equal Channel Angular Extrusion ◽  
Martensitic Transformations ◽  
Optical Microscope ◽  
Medium Temperature ◽  
Thermal Peak ◽  
Ni Alloy ◽  
Coarse Grains ◽  
Angular Extrusion

Submicron-grained Ti-50.9at%Ni alloy was prepared by Equal Channel Angular Extrusion (ECAE) at medium temperature(500°C). Microstructure evolution and phase transformations of Ti-50.9at%Ni alloy after ECAE processes at medium temperature have been investigated by optical microscope, TEM and DSC tests. It is found that the initial coarse grains of Ti-50.9at%Ni alloy were refined into submicron grains, smaller than 0.5 um in size, after eight passes ECAE at 500°C. Martensitic transformation temperatures decreased remarkably after one pass ECAE and more gently with increasing the pass number of ECAE. R phase transformation was stimulated after ECAE processes and underwent within a larger temperature range with an ambiguous thermal peak. The reverse R phase and reverse martensitic transformations, during heating, were separated eventually after eight passes ECAE.

Recrystallization Characteristics of Ti-50.9at%Ni Alloy Processed by Equal Channel Angular Extrusion

2007 ◽  
Vol 26-28 ◽  
pp. 385-388 ◽  
Author(s):  
Zhi Guo Fan ◽  
Chao Ying Xie
Keyword(s):  
High Temperature ◽  
Optical Microscopy ◽  
Equal Channel Angular Extrusion ◽  
Recrystallization Process ◽  
Recrystallization Behavior ◽  
Ni Alloy ◽  
Coarse Grains ◽  
Angular Extrusion

The initial coarse grains of Ti-50.9at%Ni alloy were refined into submicron grains, small than 0.5 um in size, after eight passes Equal Channel Angular Extrusion (ECAE) at 500°C. Optical microscopy and high temperature DSC tests were applied to investigate recrystallization behavior. It is found that the recrystallization start (Rs) and recrystallization peak (Rp) temperatures of Ti-50.9at%Ni specimens processed by eight passes ECAE are lower than that of the samples processed by one pass ECAE. Ti-50.9at%Ni specimens processed by eight passes ECAE with submicron grains are characterized by higher stability and need less energy to finish recrystallization process.

Analysis of texture evolution in equal channel angular extrusion of copper using a new flow field

2004 ◽  
Vol 52 (7) ◽  
pp. 1885-1898 ◽  
Author(s):  
László S. Tóth ◽  
Roxane Arruffat Massion ◽  
Lionel Germain ◽  
Seung C. Baik ◽  
Satyam Suwas
Keyword(s):  
Flow Field ◽  
Equal Channel Angular Extrusion ◽  
Texture Evolution ◽  
Angular Extrusion

Tube Equal Channel Angular Extrusion (tECAE) of Mg-3Al-1Zn alloy

2021 ◽  
pp. 141236
Author(s):  
Abhinav Srivastava ◽  
Matthew W. Vaughan ◽  
Bilal Mansoor ◽  
Wahaz Nasim ◽  
Robert Barber ◽  
...  
Keyword(s):  
Equal Channel Angular Extrusion ◽  
Angular Extrusion
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