TC4 ELI钛合金动态压缩性能及绝热剪切敏感性的研究

doi:10.3969/j.issn.1000-1093.2020.02.019

兵工学报 ›› 2020, Vol. 41 ›› Issue (2): 366-373.doi: 10.3969/j.issn.1000-1093.2020.02.019

TC4 ELI钛合金动态压缩性能及绝热剪切敏感性的研究

徐雪峰¹，王琳^1,2,3，沙彦刚¹，杨思琪¹，刘安晋¹， Tayyeb Ali¹，张斌斌⁴，赵登辉⁵

(1.北京理工大学材料学院，北京 100081; 2.北京理工大学冲击环境材料技术国家重点实验室，北京 100081; 3.北京理工大学爆炸科学与技术国家重点实验室，北京 100081; 4.洛阳船舶材料研究所，河南洛阳 471023; 5.中国兵器工业标准化研究所，北京 100089)

收稿日期:2019-04-15 修回日期:2019-04-15 上线日期:2020-04-04
通讯作者: 王琳(1971—), 女，副教授，硕士生导师 E-mail:linwang@bit.edu.cn
作者简介:徐雪峰（1995—），男，硕士研究生。 E-mail: bit_xfx@163.com
基金资助:
爆炸科学与技术国家重点实验室基金项目（YBKT-17-06）

Research on Dynamic Mechanical Properties of TC4 ELI Titanium Alloy and Its Sensitivity to Adiabatic Shear Banding

XU Xuefeng¹， WANG Lin^1,2,3， SHA Yangang¹， YANG Siqi¹， LIU Anjin¹，TAYYEB Ali¹， ZHANG Binbin⁴， ZHAO Denghui⁵

(1.School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China; 2.National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing Institute of Technology, Beijing 100081, China; 3.State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China; 4.Luoyang Ship Materials Research Institute, Luoyang 471023, Henan, China; 5.China Ordnance Industrial Standardization Research Institute, Beijing 100089, China)

Received:2019-04-15 Revised:2019-04-15 Online:2020-04-04

摘要/Abstract

摘要： 通过固溶处理获得不同片层厚度的TC4 ELI钛合金组织，研究片层厚度对材料动态压缩性能及绝热剪切敏感性的影响。利用分离式霍普金森压杆及限位环技术对材料进行应变控制加载，结合金相显微镜和定量金相表征方法，对其微观组织演化进行观察分析。结果表明：随着固溶温度的升高，片层组织TC4 ELI钛合金的片层厚度从3.1 μm降低至1.0 μm；在准静态压缩和动态压缩实验中，随着片层厚度的降低，材料均表现出强度升高且塑性下降的特性；在绝热剪切敏感性实验中，片层厚度更小的合金中绝热剪切带更易产生，即随着片层厚度的减小，材料的绝热剪切敏感性提高。

关键词: 钛合金, 动态压缩性能, 绝热剪切敏感性, 分离式霍普金森压杆

Abstract: The α lamellar microstructures with different thicknesses were obtained by proper heat treatments of TC4 ELI alloy. The influence of α lamellar thickness on the dynamic mechanical properties of the material and its sensitivity to adiabatic shear banding was investigated. The split Hopkinson pressure bar and the stop ring technique are used to test the samples under strain controlled loading. The microstructure evolution is analyzed by microscope and quantitative metallography method. The experimental results demonstrate that the thickness of titanium alloy with lamellar structure decreases from 3.1 μm to 1.0 μm with the increase in solid solution temperature. Under the quasi-static compression and dynamic compression conditions, the material strength decreases as the thickness of lamellar α increases, while its plasticity exhibits a declining trend. In the adiabatic shear sensitivity experiment, the adiabatic shear bands are more likely to nucleate and propagate in the alloy with smaller lamellar thickness, that is, as the thickness of the lamella decreases, the adiabatic shear sensitivity of the material increases. Key

Key words: titaniumalloy, dynamiccompressionproperty, sensitivitytoadiabaticshearbanding, splitHopkinsonpressurebar

中图分类号:

TG146.23

徐雪峰，王琳，沙彦刚，杨思琪，刘安晋， Tayyeb Ali，张斌斌，赵登辉. TC4 ELI钛合金动态压缩性能及绝热剪切敏感性的研究[J]. 兵工学报, 2020, 41(2): 366-373.

XU Xuefeng， WANG Lin， SHA Yangang， YANG Siqi， LIU Anjin，TAYYEB Ali， ZHANG Binbin， ZHAO Denghui. Research on Dynamic Mechanical Properties of TC4 ELI Titanium Alloy and Its Sensitivity to Adiabatic Shear Banding[J]. Acta Armamentarii, 2020, 41(2): 366-373.

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TC4 ELI钛合金动态压缩性能及绝热剪切敏感性的研究

Research on Dynamic Mechanical Properties of TC4 ELI Titanium Alloy and Its Sensitivity to Adiabatic Shear Banding

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