变形量对TC18钛合金力学性能的影响  

Influence of Deforming Amount on Mechanical Properties of TC18 Alloy

作　　者：沙爱学[1] 李兴无[1] 王庆如[1] 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《材料工程》2014年第11期34-37,共4页Journal of Materials Engineering

摘　　要：采用一种专门用于钛合金锻造工艺参数定量研究的专利技术研究了β区变形量(从10%到65%)对TC18钛合金关键力学性能、显微组织的影响。研究结果表明:β区变形时,变形量对合金抗拉强度影响不大,σb在1150MPa左右;但对合金伸长率、断面收缩率和断裂韧度均有显著影响。变形量每增加10%,伸长率可提高0.7%左右;断面收缩率提高4%左右;断裂韧度下降3MPa·m1/2左右。为获得TC18钛合金强度-塑性-韧性的最佳匹配,应将β区变形量控制在35%左右。The influence of β zone deforming amount (changing from 10% to 65%) on microstructure and key mechanical properties of TC18 (Ti-5Al-5Mo-5V-1Cr-1Fe) alloy has been studied by using a patent technology, specially for the quantitative study of titanium alloy forging process parameters. The results show that when β zone deforms, the deforming amount has little effect on the tensile strength, and σb is at around 1150MPa; but has obvious influence on the elongation rate, ductility and fracture toughness. When forging in beta field, the deforming amount is increased every 10%, the elongation rate is increased about 0.7%, fracture shrinkage is increased about 4%, fracture toughness is reduced about 3 MPa·m1/2. In order to achieve the optimum match for TC 18 titanium alloy strength, plasticity and toughness, β zone deforming amount should be controlled around 35%.

关 键 词：TC18钛合金 B锻造 变形量 力学性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]