Journal Article

Recrystallization temperature of tungsten with different deformation degrees

Xiao-Xin Zhang Qing-Zhi Yan Chun-Tian Yang Tong-Nian Wang Min Xia Chang-Chun Ge

2016

Overview

Pure tungsten （PW） and W-1 wt% La203 （WL10） were prepared by powder metallurgical route fol- lowed by the swaging ＋ rolling process. The logarithmic strains are 0, 0.37, 0.58, and 0.98 for WL10 and 0, 0.58 for PW. Heat treatments were performed at temperatures var- ied from 1,573 to 2,173 K to determine the recrystalliza- tion temperature. Recrystallization temperatures are 1,973 and 2,173 K for WL1 （logarithmic strain of 0.37） and WL3 （logarithmic strain of 0.98）, respectively. But in the case of WL2 （logarithmic strain of 0.58）, full recrystallization is not achieved at temperature of above 2,173 K. Further- more, the recrystallization temperature of PW with loga- rithmic strain of 0.58 is at least 300 K lower than that of the equivalent WLI0 sample. Moreover, the increase of recrystallization temperature inhibits the strength degra- dation of WL2： samples lose 4 % and 22 % strength when annealed at 1,573 and 1,973 K compared with room tem- perature （RT） sample. Finally, the texture evolution for the swaged ＋ rolled WL10 is significantly related to the deformation degree： the dominated orientation is （001） for WL2 while （110） for WL3.

• Publisher: Nonferrous Metals Society of China,Springer Nature B.V
• Subject: Biomaterials / Chemistry and Materials Science / Deformation / Energy / Evolution / Grain size / Heat treatment / High temperature / La2O3 / Lanthanum oxides / Logarithms / Materials Engineering / Materials Science / Mechanical properties / Metallic Materials / Nanoscale Science and Technology / Particle size / Physical Chemistry / Powder metallurgy / Recrystallization / Room temperature / Scanning electron microscopy / Strain / Strength / Surface layer / Swaging / Swaging + rolling / Texture / Tungsten / 再结晶温度 / 变形程度 / 对数应变 / 强度退化 / 热处理温度 / 粉末冶金 / 纯钨 / 轧制工艺