对锻态 Ti-4Al-3.8Mo合金分别进行了β单相区和α+β两相区(相变点之下45℃)淬火处理,研究了亚稳相变对硬度的影响.结果表明,β单相区淬火处理的样品硬度比α+β两相区处理的样品高约10%.β单相区淬火后的相组成为全α'马氏体,自910℃的α+β两相区淬火后的相组成为等轴初生α相+α'马氏体+α"马氏体.硬度出现差异的主要原因是后者中存在硬度较低的初生α相和α"马氏体.本文修正了Ti-β稳定元素二元系亚稳相图(示意图),指出在α+α'和α+α"相区之间存在α+α'+α"相区,并使用修正后的相图解释了Ti-4.4Al-3.8Mo合金的相组成与硬度的关系.
参考文献
| [1] | E.A.Bolisowa,Metallography of Titanium Alloys(Beijing,Defense Industry Press,1980)p.303,311(E.A.鲍利索娃,陈石卿译,钦合金金相学(北京,国防工业出版社,1980)p.303,311) |
| [2] | J.C.Williams,E.A.Starke,Jr,Progress in structural materials for aerospace systems,Acta Mater.,51,5775(2003) |
| [3] | C.Leyens,M.Peters,Titanium and Titanium Alloys(Beijing,Chemical Industry Press,2005)p.54(C.莱茵斯,M.皮特尔斯,陈振华等译,钦与钛合金(北京,化学工业出版社,2005)p.54) |
| [4] | L.Zeng,T.R.Bieler,Effects of working,heat treatment,and aging on microstructural evolution and crystallographic texture of α,α',α"andβphases in Ti-6Al-4V wire,Mater.Sci.Eng.A,392,403(2005) |
| [5] | T.Ahmed,H.J.Rack,Phase transformations during cooling in α+βtitanium alloys,Mater.Sci.Eng.A,243,206(1998) |
| [6] | J.I.Qazi.O.N.Senkov,J.Rahim,F.H.Froes,Kinetics of marteusite decomposition in Ti-6Al-4V-xH alloys,Mater.Sci.Eng.A,359,137(2003) |
| [7] | ZONG Yingying,XUE Kemin,SHAN Debin,LU Yan,Effect of heat treatment on the microstructure and mechanical properties of BT14 titanium alloy,Mater.Sci.Technol,10,548(2004)(宗影影,薛克敏,单德彬,吕炎,热处理对BT14钛合金显微组织和力学性能的影响,材料科学与工艺,10,548(2004)) |
| [8] | M.J.R.Barboza,C.M.Neto,C.R.M.Silva,Creep mechanisms and physical modeling for Ti-6Al-4V.Mater.Sci.Eng.A,369,201(2004) |
| [9] | T.Bieler,R.L.Goetz,S.L.Semiatin,Anisotropic plasticity and cavity growth during upset forging of Ti-6Al-4V,Mater.Sci.Eng.A,405,201(2005) |
| [10] | Y.Kawabe,S.Muneki,Strengthening and toughening of titanium alloys,ISIJ Int.,31(8),785(1991) |
| [11] | K.S.Lee,J.H.Song,Estimation methods for strain-life fatigue properties from hardness,Int.J.Fatigue,28,386(2006) |
| [12] | V.d.Castro,T.Leguey,A.Mufioz,M.A.Monge,R.Pareja,Relationship between hardness and tensile tests in titanium reinforced with yttria nanoparticles,Mater.Sci.Eng.A,400-401,345(2005) |
| [13] | YANG Yi,XU Feng,HUANG Aijun,LI Geping,Evolution of microstructure of full lamellar titanium alloy BT18Y solutionized at α+β phase field,Acta Metall.Sin.,7,714 (2005)(杨义,徐锋,黄爱军,李阁平,全片层BT18Y钛合金在α+β相区固溶时的显微组织演化,金属学报,7,714(2005)) |
| [14] | SHU Delia.Mechanical Properties of Metals(Beijing,Machine Industry Press,1999)p.12(束德林,金属力学性能(北京,机械工业出版社,1999)p.12) |
| [15] | Nonlerrous Metals and Heat Treatment,(Beijing,Defense Industry Press,1981)p.208-213(《有色金属及其热处理编写组,有色金属及其热处理(北京,国防工业出版社,1981)p.208-213) |
| [16] | ZHANG Xiyan,ZHAO Yongqing,BAI Chenguang,Titanium Alloy and Application(Beijing,Chemical Industry Press,2005)p.92(张喜燕,赵永庆,白晨光,钦合金及应用(北京,化工出版社,2005)p.92) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%