李军,王健杰,郭太煜,朱永伟,左敦稳.侧面逐层抛光腐蚀法研究亚表面损伤[J].表面技术,2019,48(8):309-315.
LI Jun,WANG Jian-jie,GUO Tai-yu,ZHU Yong-wei,ZUO Dun-wen.Subsurface Damage Studied by Side Layer-by-Layer Polishing and Etching Method[J].Surface Technology,2019,48(8):309-315 |
| 侧面逐层抛光腐蚀法研究亚表面损伤 |
| Subsurface Damage Studied by Side Layer-by-Layer Polishing and Etching Method |
| 投稿时间：2018-10-23 修订日期：2019-08-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2019.08.041 |
| 中文关键词: 侧面逐层抛光腐蚀法 亚表面损伤 裂纹 静态载荷 回归分析 |
| 英文关键词:side layer-by-layer polishing and etching subsurface damage crack static load regression analysis |
| 基金项目:国家自然科学基金（51675276）；江苏省自然科学基金（BK20181294）；大连理工大学精密与特种加工教育部重点实验室研究基金（JMTZ201801） |
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| Author | Institution |
| LI Jun | School of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
| WANG Jian-jie | School of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
| GUO Tai-yu | School of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
| ZHU Yong-wei | School of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
| ZUO Dun-wen | School of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| 中文摘要: |
| 目的 直接测量加工后工件的亚表面损伤，观察亚表面裂纹整体形貌与扩展情况，探究不同载荷下工件的亚表面损伤形貌及损伤深度，指导加工工艺设计，减小加工后工件的亚表面损伤。方法 通过静态压痕实验在石英玻璃表面产生压痕，采用侧面逐层抛光腐蚀法研究压痕载荷对工件亚表面裂纹的影响及裂纹在工件亚表面的扩展情况，通过回归分析法研究压痕载荷与亚表面裂纹深度之间的关系。结果 载荷小于0.098 N时，工件上压痕为规则菱形，工件表面发生塑性变形，亚表面不产生裂纹；载荷大于0.245 N时，工件表面出现白色发亮的隆起，亚表面开始产生裂纹，且随载荷的增加，裂纹深度逐渐增大，裂纹形貌从“八”字型径向裂纹为主逐渐变成中位裂纹和多条径向裂纹并存的“爪”状形貌。结论 压痕载荷与亚表面裂纹深度呈幂函数相关，当压痕载荷较小时，工件存在一定的塑性加工域；当载荷大于一定值时，工件亚表面开始产生裂纹，载荷越大，压痕表面越易产生隆起、崩碎、剥落等现象，同时产生的亚表面裂纹深度也越深。 |
| 英文摘要: |
| The work aims to directly measure the subsurface damage of the workpiece after machining, observe the whole morphology and expansion of subsurface crack and explore the morphology and depth of the workpiece subsurface damage under different loads, so as to guide the design of the machining process and reduce the subsurface damage of the workpiece after machining. Static indentation test was used to generate indentation on quartz glass surface. Side layer-by-layer polishing and etching method was adopted to investigate the effect of load on subsurface cracks of the workpiece and the crack extension on the subsurface. The relationship between the indentation load and subsurface crack depth was studied through the regression analysis method. When the load was less than 0.098 N, the indentation on the workpiece was in a regular diamond shape. There was plastic deformation on the surface, but no crack on the subsurface. When the load was greater than 0.245 N, there was a noticeable bulge on the surface of the workpiece. The subsurface cracks appeared and the crack depth increased as the load increased, and the crack morphology gradually changed from “splayed” radial cracks to median cracks and plurality of radial cracks. The indentation load is related to the depth of subsurface cracks as a power function. When the load is small, there is a certain plastic processing domain for the workpiece. When the load is greater than a certain value, the crack begins to gradually appear on the subsurface of the workpiece. The bigger the load is, the more likely the surface would be bulged, collapsed, peeled off, etc. The subsurface crack is also deeper. |
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