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Research on development of evaluation technique for wear of ceramic coated materials

陶瓷涂层材料磨损评价技术的研究进展

基本信息

批准号：
07555025
负责人：
ISHIKAWA Hiromasa
金额：
$ 4.74万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555025/
关键词：
Ceramic Coating Wear Delamination Cyclic Contact Constitutive Model for Plasticity Finite Element Method Tribology PVD

项目摘要

(1) Numerical simulation of wear mechanismTo analyze the deformation of ceramic coated materials during rolling-sliding contact, the computer simulation using the constitutive equation for cyclic plasticity was conducted. The result shows that there is the significant discontinuity of stresses and strains on the interface of coating layrs and substrates, and that would cause the delamination of coating layrs which is considered to be the wear life limit of the ceramic coated material.(2) Wear test of ceramic coated materialFrom the wear test of ceramic coated materials using a pin-on-dick wear machine, it is found that the ceramic coating makes the life of materials against wear apparently longer and the evaluation of wear life for ceramic coated materials corresponds to the evaluation of delamination of coating layrs. Moreover, the effect of the conditions in coating process on the wear resistance is also important in the evalualions.(3) Relation between computer simulation and wear predictionThe fatigue wear in the materials is more significant comparing to adhesive wear on the contact surface because coating layrs protect the contact surface. Then the relationship between mechanical states of substrate, which is obtained from the computer simulation, and actual wear phenomenon was considered. At first, the low cycle fatigue tests of substrate materials in multi axial state were conducted and it was clarified that the fatigue life of the material is closely related to the density of the plastic work which the materials are subjected to. Then the wear life prediction calculated from the computer simulation and the fatigue tests was compared with the result from the wear test under the same conditions as calculation, and these results showed a good agreement with the wear life of the materials.

(1)磨损机理的数值模拟为了分析陶瓷涂层材料在滚动-滑动接触过程中的变形，采用循环塑性本构方程进行了计算机模拟。结果表明，陶瓷涂层与基体的界面处存在明显的应力应变不连续性，这将导致陶瓷涂层的分层，而分层是陶瓷涂层材料的磨损寿命极限。(2)陶瓷涂层材料的磨损试验通过对陶瓷涂层材料在针-棒磨损机上的磨损试验，发现陶瓷涂层使材料的耐磨寿命明显延长，对陶瓷涂层材料磨损寿命的评价与涂层分层的评价相一致。此外，涂层工艺条件对涂层耐磨性的影响也是评价涂层耐磨性的重要因素。(3)计算机模拟与磨损预测的关系由于涂层对接触面的保护作用，材料内部的疲劳磨损比接触面上的粘着磨损更为显著。在此基础上，考虑了计算机模拟得到的基体力学状态与实际磨损现象之间的关系。首先进行了基体材料多轴状态下的低周疲劳试验，阐明了材料的疲劳寿命与材料所受塑性功的密度密切相关。将计算机模拟计算的磨损寿命与疲劳试验结果进行了比较，结果表明，计算结果与材料的磨损寿命吻合较好。