TC18钛合金在热变形过程中的组织不均匀现象  

Microstructure Heterogeneity of TC18 TiAlloy during Hot Deformation

作　　者：孙曙宇[1] 吕维洁[2] 

机构地区：[1]台州学院,浙江台州318000 [2]上海交通大学金属基复合材料国家重点实验室,上海200240

出　　处：《稀有金属材料与工程》2016年第6期1545-1548,共4页Rare Metal Materials and Engineering

基　　金：浙江省教育厅科研项目(Y201533396)

摘　　要：揭示了Ti-5Al-5Mo-5V-1Fe-1Cr合金在等温压缩过程中出现的组织不均匀现象。首先使用真空自耗炉制备出合金铸锭,而后进行热加工和热处理,使用热处理后的材料车削成圆柱形试样进行等温压缩试验,试样端面没有进行打磨、抛光处理,结果出现了严重的组织不均匀,在试样内部发现了轴对称分布的局部大变形区,这将增加材料受力时起裂的几率。并就该组织现象展开了研究。The microstructure heterogeneity of Ti-5Al-5Mo-5V-1Fe-1Cr Ti alloy during isothermal compression was revealed. Firstly, the alloy was fabricated via a consumable vacuum arc-remelting furnace. Then the as-cast ingot was subjected to thermo-mechanical processing and heat treatment. The cylindrical specimens were machined from the heat-treated rods. Isothermal compression tests were conducted subsequently. The two ends of the specimens were not rubbed or polished. Results show that large local deformation zones appear in the specimens after isothermal compression, which may cause crack nucleation in the material in the case of loading. Finally, the microstructure phenomenon was investigated.

关 键 词：TC18钛合金 等温压缩 组织不均匀 

分 类 号：TG146.23[一般工业技术—材料科学与工程]