Influence of Temperature and Strain Rate on Microstructural Evolution During Hot Compression of Ti-45Al-xNb-0.2C-0.2B Titanium Aluminide Alloys

JOM ◽  
2019 ◽  
Vol 71 (10) ◽  
pp. 3552-3564 ◽  
Author(s):  
Nitish Bibhanshu ◽  
Amit Bhattacharjee ◽  
Satyam Suwas
Keyword(s):  
Strain Rate ◽  
Microstructural Evolution ◽  
Titanium Aluminide ◽  
Hot Compression ◽  
Influence Of Temperature ◽  
Titanium Aluminide Alloys

MICROSTRUCTURAL EVOLUTION AND FLOW BEHAVIOR OF TWIN-ROLL CAST AZ41 MAGNESIUM ALLOY DURING HOT COMPRESSION

2012 ◽  
Vol 26 (32) ◽  
pp. 1250181
Author(s):  
ZHIYI LIU ◽  
XU CHEN ◽  
YANHUI HOU ◽  
SUKBONG KANG
Keyword(s):  
Elevated Temperature ◽  
Magnesium Alloy ◽  
Dynamic Recrystallization ◽  
Strain Rate ◽  
Microstructural Evolution ◽  
Flow Behavior ◽  
Hot Compression ◽  
Dislocation Slip ◽  
Twin Roll Cast ◽  
Twin Roll

Microstructural evolution and flow behavior of twin-roll cast AZ41 magnesium alloy during hot compression were characterized by employing deformation temperature of 300°C, 350°C and 400°C, and strain rate ranging from 10-3 to 10-2 s -1. When compressed at different temperature (300°C, 350°C and 400°C) and strain rate (10-3 and 10-2 s -1) all stress strain curves showed a flow softening behavior before strained to 0.51 due to dynamic recrystallization, even though concurrent twinning was quite active. Twinning contributed to the flow hardening behavior appeared during the end of hot compression (ε > 0.51) at a strain rate of 10-2 s -1 and elevated temperature (300°C, 350°C and 400°C) in spite of the softening effect of concurrently occurred dynamic recrystallization. TEM image showed that discontinuous recrystallization occurred when deformed at elevated temperature as high as 400°C and the strain rate ranging from 10-2 to 10-3 s -1. It is suggested that dislocation slip, twinning and recrystallization develop in a cyclic mode from initial stage to the end of hot compression.

Effect of strain rate on microscale formability and microstructural evolution of TA1 foil

2021 ◽  
pp. 141338
Author(s):  
Tianyi Ma ◽  
Yao Wang ◽  
Chao Yang ◽  
Alamusi ◽  
Qibo Deng ◽  
...  
Keyword(s):  
Strain Rate ◽  
Microstructural Evolution

Hot compression behaviors and microstructural evolution of beryllium by vacuum hot pressing

2021 ◽  
pp. 130193
Author(s):  
Xinghui He ◽  
Jinru Luo ◽  
Qingdong Xu ◽  
Chunli Jiang ◽  
Yongxing Bao ◽  
...  
Keyword(s):  
Microstructural Evolution ◽  
Hot Pressing ◽  
Hot Compression ◽  
Vacuum Hot Pressing

The Dependence of Tensile Ductility on Investment Casting Parameters in Gamma Titanium Aluminides

1998 ◽  
Vol 552 ◽  
Author(s):  
R. Raban ◽  
L. L. ◽  
T. M.
Keyword(s):  
Titanium Aluminide ◽  
Titanium Aluminides ◽  
Tensile Ductility ◽  
Gamma Titanium Aluminide ◽  
Cooling Rates ◽  
Gamma Titanium ◽  
Investment Cast ◽  
Thermal Data ◽  
Titanium Aluminide Alloys ◽  
Simulation Package

ABSTRACTPlates of three gamma titanium aluminide alloys have been investment cast with a wide variety of casting conditions designed to influence cooling rates. These alloys include Ti-48Al-2Cr-2Nb, Ti- 47Al-2Cr-2Nb+0.5at%B and Ti-45Al-2Cr-2Nb+0.9at%B. Cooling rates have been estimated with the use of thermal data from casting experiments, along with the UES ProCAST simulation package. Variations in cooling rate significantly influenced the microstructure and tensile properties of all three alloys.

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