杨慎亮,李勋,王子铭,官椿明.TC4侧铣表面完整性对试件疲劳性能的影响[J].表面技术,2019,48(11):372-380.
YANG Shen-liang,LI Xun,WANG Zi-ming,GUAN Chun-ming.Influence of Side Milling on Surface Integrity and Fatigue Behavior of TC4 Specimens[J].Surface Technology,2019,48(11):372-380 |
| TC4侧铣表面完整性对试件疲劳性能的影响 |
| Influence of Side Milling on Surface Integrity and Fatigue Behavior of TC4 Specimens |
| 投稿时间：2019-03-11 修订日期：2019-11-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.11.043 |
| 中文关键词: TC4钛合金 疲劳性能 表面完整性 显微硬度 表面粗糙度 |
| 英文关键词:TC4 titanium alloy fatigue behavior surface integrity microhardness surface roughness |
| 基金项目:国家科技重大专项（2018ZX04005001） |
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| Author | Institution |
| YANG Shen-liang | 1.School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China |
| LI Xun | 1.School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China |
| WANG Zi-ming | 1.School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China |
| GUAN Chun-ming | 2.Beijing Xinghang Mechanical and Electrical Equipment Co., Ltd, Beijing 100074, China |
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| 中文摘要: |
| 目的 提升钛合金的抗疲劳性能，丰富典型航空难加工材料疲劳失效的基础理论，为实际航空结构件的抗疲劳制造提供参考。方法 以TC4钛合金为研究对象，采用单因素实验法，通过侧铣及试件疲劳性能测试，对比分析了铣削参数（包括铣削线速度vc、每齿进给量fz及径向切深ae）对表面完整性及表面完整性各指标（主要包括表面粗糙度、表面显微硬度及表面残余应力等）对试件疲劳性能的影响规律。结果 表面完整性的测量结果显示，表面粗糙度随fz和ae的增加而增大，随vc的变化不显著；表面显微硬度随fz的增加而增大，随vc和ae的增加而减小；同时，加工表面均呈现残余压应力状态，且表面残余应力的幅值随vc的增加而减小，随ae的增加呈先增大后减小的变化，随fz的变化不明显。试件疲劳性能测试的结果表明，表面显微硬度是影响TC4钛合金试件疲劳性能的主要因素。结论 在实验条件下，随着表面显微硬度的增加，试件的疲劳性能逐渐提升，并且当vc=20 m/min、fz=0.08 mm/z和ae=0.1 mm时，试件的疲劳性能最佳。 |
| 英文摘要: |
| The work aims to improve the fatigue behavior of titanium alloy, enrich the basic theory of fatigue failure of typical aviation difficult-to-cut materials and provide references for anti-fatigue manufacturing of aerospace structural parts. TC4 titanium alloy was used as the research object to conduct single factor experiments. Side milling and fatigue tests were carried out to compare the influence of machining parameters (milling linear speed vc, feed engagement fz and radial cutting depth ae) on TC4 titanium alloy specimens’ surface integrity and the influence of surface integrity indexes (mainly including surface roughness, surface microhardness and surface residual compressive stress) on fatigue behavior. From the measurement result of surface integrity, the surface roughness increased as fz and ae increased, respectively, but did not change obviously with vc. The surface microhardness increased with the increase of fz, but decreased with the increase of vc and ae, respectively. Residual compressive stress could be detected on all machined surfaces, which presented a linear decrease with the increase of vc, increased first and then decreased with the increase of ae, and had no obviously change with the variation of fz. From the fatigue performance results of specimens, microhardness had the most significant effect on the fatigue behavior of TC4 specimens. With the increase of microhardness, the fatigue behavior increases notably. Under the machining parameters of vc=20 m/min, fz=0.08 mm/z and ae=0.1 mm, TC4 specimens have the best fatigue behavior. |
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