摘要
研究了β退火冷却时冷却速率对Ti55531合金显微组织、室温拉伸性能、断裂韧度和冲击性能的影响。结果表明,Ti55531合金以不同的冷却速率炉冷后,显微组织均由平直晶界α相(αGB)、残余β相以及尺寸不一的晶内片层状α相(αWM)组成;随着冷却速率的提高,晶内片层状α相厚度逐渐减小,晶界α相厚度变化不是很明显;Ti55531合金在进行β退火冷却时析出的片层状α相厚度与其力学性能有着直接的关系,随着片层状α相厚度的减小,其抗拉强度和屈服强度逐渐增加,延伸率和断面收缩率逐渐减小,断裂韧度和冲击吸收能量均呈现逐渐减小的趋势。
Influences of cooling rate on the microstructures,room temperature tensile properties,fracture toughness and impact properties of Ti55531 alloy duringβannealing were analyzed.The results show that the microstructures of Ti55531 alloy after furnace cooling with different cooling rates are composed of straight grain boundaryαphase(αGB),residualβphase and intragranular lamellarαphase(αWM).With the increase of cooling rate,the thickness of intragranular lamellarαphase decreases gradually,and the thickness change of grain boundaryαphase is not obvious.There is a direct relationship between the thickness of lamellarαphase precipitated duringβannealing cooling and mechanical properties of Ti55531 alloy.With the decrease of lamellarαphase thickness,the tensile strength and yield strength increase gradually,the elongation and reduction of area decrease gradually,and the fracture toughness and impact energy also decrease gradually.
作者
王志录
胡博文
范佳俊
商国强
刘秀良
Wang Zhiu;Hu Bowen;Fan Jiajun;Shang Guoqiang;Liu Xiuiang(Jiangxi Jinghang Aviation Forging&Casting Co.,Ltd.,Jingdezhen 333039,China;Key Laboratory of Advanced Titanium Alloys,AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)
出处
《钛工业进展》
CAS
2023年第6期22-26,共5页
Titanium Industry Progress
