文献类型：期刊文献

中文题名：纳米压痕测量因素对IN718力学行为测试结果的影响

英文题名：The Influence factors on mechanical behaviour test results of IN718 by using nano-indentation method

作者：朱文波[1];谈建平[1];孙伯仲[1];常帅[1];裴玉冰[2,3];涂善东[1]

机构：[1]华东理工大学承压系统与安全教育部重点实验室,上海200237;[2]长寿命高温材料国家重点实验室,四川德阳618000;[3]东方电气集团东方汽轮机有限公司,四川德阳618000

年份：2023

卷号：49

期号：6

起止页码：30

中文期刊名：中国测试

外文期刊名：China Measurement & Test

收录：CSTPCD;;北大核心:【北大核心2020】；

基金：国家自然科学基金(52130511,52075174)。

语种：中文

中文关键词：纳米压痕;影响因素;有限元;测量误差;IN718合金

外文关键词：nano-indentation;influence factors;finite element;measurement error;IN718 alloy

摘要：采用试验测试与有限元模拟相结合的方法,研究纳米压痕测量因素对IN718合金力学行为的影响。结果表明,对于IN718材料,存在明显的压痕尺寸效应,随着压入深度的增加,硬度逐渐降低,且在压入深度达到1000 nm之后硬度值的变化趋于稳定;当试样厚度与压入深度之比(“厚深比”)≥20之后,载荷位移曲线趋于一致,推荐最佳“厚深比”为20;摩擦系数对压痕的载荷-位移曲线几乎没有影响,但会影响压痕表面堆积轮廓,随着摩擦系数的增加,压痕表面材料的堆积逐渐减小,当摩擦系数达到0.2之后,表面材料堆积的减少逐渐趋于稳定;被压试样表面倾斜角对压痕的载荷-位移曲线有一定影响,倾斜角在5°以内时,压痕的载荷-位移曲线差别不大,峰值载荷最大误差均在5%以内,即可认为倾斜角≤5°时误差在可接受范围内。
The effect of nano-indentation measurement factors on mechanical behavior of IN718 alloy was studied by combining experimental test and finite element simulation.The results show that the hardness decreases gradually with the increase of indentation depth,and the change of hardness tends to be stable after the indentation depth reaches 1000 nm.When the ratio of thickness to indentation depth(thickness-depth ratio)is greater than or equal to 20,the load displacement curve tends to be consistent,and the best thickness-depth ratio is recommended to be 20.The friction coefficient has little effect on the load-displacement curve of the indentation,but it does affect the indentation surface profile.With the increase of the friction coefficient,the accumulation of materials on the indentation surface decreases gradually.When the friction coefficient reaches 0.2,the reduction of surface material accumulation tends to be stable.The surface inclination angle of the indented sample has a certain influence on the load-displacement curve of the indentation.When the inclination angle is within 5°,the load-displacement curve has little difference,and the maximum error of the peak load is within 5%.It can be considered that the error is within the acceptable range when the inclination angle is less than or equal to 5°.