β单相区固溶温度对Ti-55531合金组织及性能的影响
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摘要
研究了β单相区不同的固溶温度对Ti-55531合金片层组织参数及力学性能的影响规律。结果表明,经不同温度固溶处理,再经相同的时效处理后,合金的β晶粒尺寸随固溶温度的改变而改变,进而影响时效析出α片的含量及尺寸,最终导致合金力学性能的差异。当固溶温度在830～900℃之间时,随着固溶温度的升高,原始β晶粒尺寸增大,后续时效析出的α片长、宽及长宽比均先增大后减小,合金强度直线下降,塑性先降低后增加。固溶温度为860℃时,合金对应的强度塑性匹配最好。合金的断裂失效机制为以微孔聚集为主,沿晶开裂和穿晶断裂并存的混合断裂机制。
The influence of solution temperature in β phase region on the microstructural parameters and mechanical properties of Ti-55531 alloy was researched. The results show that when the solution temperature is ranging from 830 ℃ to 900 ℃,with the increase of solution temperature,the size of original β grain increases,and the length,width and length-width ratio of α phase precipitated by subsequent aging increase at first and then decrease. Meanwhile,the strength of the alloy gradually decreases,and the plasticity decreases first and then increases. As the solution temperature is 860 ℃,the alloy can obtain the good cooperation between strength and plasticity. Fracture mode of lamellar microstructures is a mixed mode,including microvoids accumulation,transgranular cleavage and intergranular fracture.
The influence of solution temperature in β phase region on the microstructural parameters and mechanical properties of Ti-55531 alloy was researched. The results show that when the solution temperature is ranging from 830 ℃ to 900 ℃,with the increase of solution temperature,the size of original β grain increases,and the length,width and length-width ratio of α phase precipitated by subsequent aging increase at first and then decrease. Meanwhile,the strength of the alloy gradually decreases,and the plasticity decreases first and then increases. As the solution temperature is 860 ℃,the alloy can obtain the good cooperation between strength and plasticity. Fracture mode of lamellar microstructures is a mixed mode,including microvoids accumulation,transgranular cleavage and intergranular fracture.
引文
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[14]权国辉,张海英.工艺参数对TC4钛合金锻件晶粒和相的影响研究[J].模具工业,2018,44(12):71-74.
[15]王清瑞,沙爱学,黄利军,等.热处理制度对Ti-55531合金组织和力学性能的影响[J].钛工业进展,2014,31(2):16-19.
[16]薛强,彭雯雯,曾卫东.α相形态与含量对TA15钛合金力学性能的影响[J].钛工业进展,2015,32(2):13-16.
[17]黄朝文,赵永庆,辛社伟,等.显微组织均匀性对片层Ti-55531合金高周疲劳裂纹萌生的影响[J].稀有金属材料与工程,2017,46(3):663-668.
[18]马英杰,刘建荣,雷家峰,等.钛合金β晶粒生长规律及晶粒尺寸对损伤容限性能的影响[J].稀有金属材料与工程,2009,38(6):976-981.
[2]张翥.β钛合金的概述[J].稀有金属,1995(4):296-299.
[3]Boyer R R.An overview on the use of titanium in the aerospace industry[J].Materials Science and Engineering A,1996,213(1):103-114.
[4]杨冬雨,付艳艳,惠松骁,等.高强高韧钛合金研究与应用进展[J].稀有金属,2011,35(4):575-580.
[5]潘浩.Ti-55531高强韧钛合金组织性能及热变形行为研究[D].西安:西安建筑科技大学,2016:71.
[6]张丰收,赖运金,王凯旋,等.热处理对Ti-5553钛合金棒材组织与性能的影响[J].稀有金属材料与工程,2014,43(6):1507-1510.
[7]Nyakana S L,Fanning J C,Boyer R R.Quick reference guide forβtitanium alloys in the 00 s[J].Journal of Materials Engineering and Performance,2005,14(6):799-811.
[8]Huang Chaowen,Zhao Yongqing,Xin Shewei,et al.Effect of microstructure on tensile properties of Ti-5Al-5Mo-5V-3Cr-1Zr alloy[J].Journal of Alloys and Compounds,2017,693:582-591.
[9]Huang Chaowen,Zhao Yongqing,Xin Shewei,et al.Effect of microstructure on torsion properties of Ti-5Al-5Mo-5V-3Cr-1Zr alloy[J].Materials Science and Engineering A,2017,682:202-210.
[10]徐锋,计波,朱益藩,等.加工工艺对Ti5553合金等温锻件力学性能和显微组织的影响[J].中国有色金属学报,2010,20(专辑1):100-103.
[11]刘宏婕.高强Ti-6Al-4.5Mo-3V-3Cr-2Sn合金的高温变形行为及热处理研究[D].哈尔滨:哈尔滨工业大学,2013:47-69.
[12]莱茵斯C,皮特尔斯M.钛和钛合金[M].陈振华,译.北京:化学工业出版社,2005:358-360.
[13]БорисоваЕА.钛合金金相学[M].陈石卿,译.北京:国防工业出版社,1986:11,23-30.
[14]权国辉,张海英.工艺参数对TC4钛合金锻件晶粒和相的影响研究[J].模具工业,2018,44(12):71-74.
[15]王清瑞,沙爱学,黄利军,等.热处理制度对Ti-55531合金组织和力学性能的影响[J].钛工业进展,2014,31(2):16-19.
[16]薛强,彭雯雯,曾卫东.α相形态与含量对TA15钛合金力学性能的影响[J].钛工业进展,2015,32(2):13-16.
[17]黄朝文,赵永庆,辛社伟,等.显微组织均匀性对片层Ti-55531合金高周疲劳裂纹萌生的影响[J].稀有金属材料与工程,2017,46(3):663-668.
[18]马英杰,刘建荣,雷家峰,等.钛合金β晶粒生长规律及晶粒尺寸对损伤容限性能的影响[J].稀有金属材料与工程,2009,38(6):976-981.