研究了双相等离子渗氮和DLC涂层对16MnCr5活塞销钢在平面和微动疲劳试验下循环性能的影响分析方法。

IF 1.6 Q2 MULTIDISCIPLINARY SCIENCES

MethodsX Pub Date : 2025-01-08 DOI:10.1016/j.mex.2025.103164

Mobin Dizisaz, Mohammad Sadegh Aghareb Parast, Mohammad Azadi

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引用次数: 0

摘要

本分析研究了16MnCr5钢的平面疲劳寿命和微动疲劳寿命的分析方法和实验数据集，以及双相等离子体氮化和类金刚石（DLC）涂层对其疲劳寿命的影响。标准样品是从内燃机中使用的工业活塞销上切割下来的，并为此目的进行机械加工。随后，在250至550 MPa的应力水平和100 Hz的频率下，对收到的和涂有dlc的样品进行了微动力为15 N的平动和微动疲劳试验。利用回归模型仔细分析了上述参数对试样疲劳行为的影响，以确定影响或显著因素。•在250至550 MPa的应力水平下进行了完全反向旋转弯曲平原和微动疲劳测试。涂层试样的疲劳寿命在纯疲劳条件下提高47.7%，在微动疲劳条件下提高85.3%。•用OM和拉曼光谱研究了DLC涂层的微观结构。DLC涂层厚度为1.956±0.1478微米，白层厚度为4.4248±0.5020微米。•在Design-Expert软件中使用泊松方法和线性回归（无变换）方法对获得的疲劳数据进行分析。在泊松回归模型中，所有疲劳数据的McFadden伪R²为94.92%，调整后的McFadden伪R²也为94.92%。分析所有对数疲劳数据的线性回归模型，R²为92.87%，调整R²为90.75%，预测R²为82.76%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

The method for impact analyzing of duplex plasma nitriding and DLC coatings on the cyclic performance of 16MnCr5 piston pin steel under plain and fretting fatigue testing

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The method for impact analyzing of duplex plasma nitriding and DLC coatings on the cyclic performance of 16MnCr5 piston pin steel under plain and fretting fatigue testing

The current analysis studied the analyzing method and experimental datasets of the plain and fretting fatigue lifetime of 16MnCr5 steels and the impact of duplex plasma nitriding and diamond-like carbon (DLC) coatings. Standard specimens were cut from industrial piston pins used in combustion engines and machined for this objective. Subsequently, plain and fretting fatigue tests, with a fretting force of 15 N, were performed on both as-received and DLC-coated specimens at stress levels ranging from 250 to 550 MPa and under a frequency of 100 Hz. The impact of the mentioned parameters on the fatigue behavior of the samples was carefully analyzed using regression models to identify the influential or significant factors.

•
Fully reversed rotary bending plain and fretting fatigue testing was conducted at stress levels ranging from 250 to 550 MPa. The fatigue lifetime of the coated samples increased by 47.7 % under pure fatigue conditions and by 85.3 % under fretting fatigue conditions, respectively.
•
OM and Raman spectroscopy were used to investigate the microstructure and the DLC coating. The thickness of the DLC coating was measured at 1.956± 0.1478 micrometers, while the thickness of the white layer was 4.4248± 0.5020 micrometers.
•
Obtained fatigue data were analyzed in Design-Expert software using the Poisson method and the linear regression (no transform) method. In the results of the Poisson regression model for all fatigue data, the McFadden Pseudo R² was 94.92 %, and the Adjusted McFadden Pseudo R² was also 94.92 %. For the linear regression model analyzing all logarithmic fatigue data, the R² was 92.87 %, the Adjusted R² was 90.75 %, and the Predicted R² was 82.76 %.

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