成分微调对中强钛合金组织与力学性能的影响  

Effect of Composition Minor Modification on Microstructure and Mechanical Properties of Middle-Strength Titanium Alloy

作　　者：李明强[1] 奚正平[1] 李长亮[1] 曲恒磊[1] 

机构地区：[1]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2007年第3期480-483,共4页Rare Metal Materials and Engineering

基　　金：国家重大自然科学基金项目(50434030);"863"高技术项目(2002AA305107)资助

摘　　要：通过成分微调在Ti-6Al-4V合金基础上发展了一种基于Ti-Al-V-Si四元系TC4S两相钛合金。研究表明,添加少量合金元素Si,并对Al,V元素含量进行微调,使新合金的主要力学性能得到提高,强度、塑性和断裂韧性得到良好匹配,从而满足了设计要求。TC4S合金可以在不明显降低塑性和韧性的前提下,比Ti-6Al-4VELI合金的强度提高80MPa^100MPa。A new alloy belonging to Ti-AI-V-Si system has been developed on the base of Ti-6Al-4V, designated as TC4S. Experimental test results show that mechanical properties of TC4S have been improved evidently by proper adjusting the contents of Al and V, adding small amount of Si when compared with conventional Ti-6Al-4V alloy. The satisfied match among the strength, the ductility and the fracture toughness of the alloy has been reached, and meets the requirements of the design. The strength of TC4S alloy can be increased by 60 MPa-100 MPa on the condition of the slight damaging its plasticity and toughness, compared with Ti-6Al-4V ELI.

关 键 词：钛合金 TI-6AL-4V TC4S 显微组织 力学性能 

分 类 号：TG113.2[金属学及工艺—物理冶金]