| 引用本文: | 耿明睿,陈皎,杨竹芳,刘梅军,何光宇,王学德.TC4钛合金表面冲蚀损伤机理的砂尘粒径依赖效应[J].中国表面工程,2018,31(3):17~26 |
| GENG Ming-rui,CHEN Jiao,YANG Zhu-fang,LIU Mei-jun,HE Guang-yu,WANG Xue-de.Dependent Effects of Particle Size on Erosion Wear Mechanism of TC4 Titanium Alloy[J].China Surface Engineering,2018,31(3):17~26 |
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| TC4钛合金表面冲蚀损伤机理的砂尘粒径依赖效应 |
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耿明睿1, 陈皎2, 杨竹芳1, 刘梅军3, 何光宇1, 王学德1
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1.空军工程大学 等离子体动力学国家重点实验室, 西安 710038;2.西安交通大学 机械工程学院, 西安 710049;3.西安交通大学 金属材料强度国家重点实验室, 西安 710049
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| 摘要: |
| 在自主搭建气流喷射式冲蚀试验平台上，采用不同粒径的石英砂，对TC4钛合金进行冲蚀试验；利用电子天平、扫描电子显微镜和X-射线应力仪对试件表面冲蚀质量损失率、冲蚀区微观形貌及应力进行检测与分析。结果表明，TC4钛合金表面的冲蚀损伤机理显著依赖于砂尘粒径，并在400 μm处发生机理转变。砂尘粒径小于400 μm时，TC4钛合金表面冲蚀质量损失率小于0.4 mg/g，其表面损伤形式以犁削、切削、铲削以及点坑等塑性损伤为主；砂尘粒径大于400 μm时，TC4钛合金表面在高应变率条件下发生表观韧脆转变，质量损失率突增至0.8 mg/g以上，损伤形式以解理破坏、脆性剥落为主。基于解理断裂的双判据模型，解释了砂尘粒径高于400 μm时TC4钛合金表面发生的脆性剥落现象。 |
| 关键词: 冲蚀磨损 砂尘粒径 TC4钛合金 冲蚀机理 |
| DOI：10.11933/j.issn.1007-9289.20180101001 |
| 分类号:TG174.4 |
| 基金项目:国家自然科学基金（51405506）；国防科技重点实验室基金（61422020702162202） |
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| Dependent Effects of Particle Size on Erosion Wear Mechanism of TC4 Titanium Alloy |
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GENG Ming-rui1, CHEN Jiao2, YANG Zhu-fang1, LIU Mei-jun3, HE Guang-yu1, WANG Xue-de1
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1.Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi'an 710038;2.School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049;3.State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049
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| Abstract: |
| Using a self-developed air jet erosion experiment platform, an erosion experiment on TC4 titanium alloy with quartz sand in different sizes was performed. The mass loss rate of the erosion, microtography of erosion areas and the stress were measured and analyzed, using a variety of instruments including electronic balance, scanning electron microscope (SEM) and X-ray diffraction (XRD). The results show that the erosion mechanism of TC4 titanium alloy surface is significantly dependent on the particle size and the mechanism changes at 400 μm. When the particle size is below 400 μm, the mass loss rate gets less than 0.4 mg/g and plowing, cutting, shoveling and pitting are the main forms of damage in the surface of TC4 titanium alloy. While the particle size is more than 400 μm, ductile-brittle transition occurs on the surface of TC4 titanium alloy at high strain rate, the mass loss rate suddenly rises above 0.8 mg/g, and cleavage damage and brittle flaking are the main forms of damage. Furthermore, the dual criterion model of cleavage fracture explains the brittle flaking phenomenon on TC4 titanium alloy when the particle size is more than 400 μm. |
| Key words: erosion wear particle size TC4 titanium alloy erosion mechanism |
