利用球形压头研究聚碳酸酯的微米划痕性能

采用100Cr6球形压头系统研究了法向载荷、划痕速度和划痕次数对聚碳酸酯划痕性能的影响. 结果表明：在单次和第15次划痕中，法向载荷增加时，摩擦系数和压入深度增加；划痕速度增加时，摩擦系数先增加后减小，压入深度减小；法向载荷增加或划痕速度减小时，残余深度增加，弹性恢复率减小. 对于多程单向滑动磨损，随着划痕次数增加，划痕宽度线性增加，划痕硬度线性减小；摩擦系数、压入深度和残余深度均呈增加趋势，但增长的速率逐渐降低，一定次数后达到稳定；压入深度和残余深度达到稳定时的划痕次数随法向载荷的增加而减小. 第15次划痕中，随着法向载荷增加，划痕宽度增加，残余划痕硬度和几何划痕硬度变化趋势相反；划痕宽度随划痕速度的增加而减小，划痕硬度随划痕速度的增加而增加，最后均趋于稳定.

A 100Cr6 spherical indenter system was employed to study the effects of normal load, scratching speed and scratching cycles on the scratch performance of polycarbonate. The results indicate that: For both the first and 15th scratching cycles, when the normal load increases, both the coefficient of friction (CoF) and indentation depth increase; when the scratching speed increases, the CoF first rises and then declines, while the indentation depth decreases. When the normal load increases or the scratching speed decreases, the residual depth increases and the elastic recovery rate decreases. For multi-pass unidirectional sliding wear, as the number of scratching cycles increases, the scratch width increases linearly while the scratch hardness decreases linearly; the CoF, indentation depth and residual depth all exhibit an upward trend, but their growth rates gradually decrease and stabilize after a certain number of cycles. The number of scratching cycles required for the indentation depth and residual depth to reach stability decreases with the increase of normal load. In the 15th scratching cycle, as the normal load increases, the scratch width increases, while the residual scratch hardness and geometric scratch hardness show opposite changing trends. The scratch width decreases with the increase of scratching speed, while the scratch hardness increases with the increase of scratching speed, and both eventually tend to stabilize.

搜集汇总

背景与挑战

背景概述

该数据集通过100Cr6球形压头实验，系统研究了法向载荷、划痕速度和划痕次数对聚碳酸酯微米划痕性能的影响。关键发现包括：法向载荷增加会提高摩擦系数和压入深度，而划痕速度变化则导致摩擦系数先增后减；在多程滑动中，划痕次数增加使划痕宽度线性增加、硬度线性减小，且参数变化速率随次数增加逐渐稳定。这些结果揭示了聚碳酸酯在微米尺度划痕下的力学行为规律。