摘要
Abstract
The effect of heat treatment temperature on the microstructure,texture,and mechanical prop-erties of Ø230 mm TA 16 bar was studied.The results show that the original microstructure of the forged bar is an elongated and deformed equiaxed structure in both horizontal and vertical directions.Twin crystals are distributed inside the large grains.The tensile strength and yield strength of the trans-verse sample are higher than those of the longitudinal sample.With the heat treatment temperature in-creases,the transverse and longitudinal microstructures gradually shift from elongated deformed grains to equiaxed grains.The original forged {10-12} has the highest content of tensile twins,and as the heat treatment temperature increases,the {10-12} tensile twins gradually decrease.When the heat treatment temperature rises to 800 ℃,the twins completely disappear,and the recrystallized grains gradually grow.The original forged texture is mainly concentrated in the {0001}//RD orientation,with a certain angle with ND.When the heat treatment temperature rises to 750 ℃,the texture strength decreases and the texture type changes,concentrated in {0001}//ND orientation,with a certain angle with RD.As the heat treatment temperature increases,the overall tensile strength,yield strength,and yield ratio of the transverse and longitudinal samples show a decreasing trend,while the elongation gradually increases.关键词
TA16钛合金/热处理/再结晶/孪晶/织构/抗拉强度Key words
TA16/heat treatment/recrystallization/twin crystals/texture/tensile strength分类
矿业与冶金
