The effect of various treatment parameters in duplex plasma nitrided and diamond-like carbon coating on high-cycle fatigue and fretting fatigue lifetimes of piston pin 16MnCr5 steel

IF 7.5 Q1 CHEMISTRY, PHYSICAL
Mobin Dizisaz, Mohammad Azadi
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引用次数: 0

Abstract

This paper investigates the impact of duplex plasma nitriding and diamond-like carbon (DLC) coatings on the pure fatigue and fretting fatigue properties of 16MnCr5 steel extracted from industrial piston pins used in combustion engines. Two different nitriding and DLC coating processes were performed: "DLC-A" and "DLC-B". The Raman spectrometry and microhardness tests were utilized to evaluate the formation of DLC coating on the sample. Subsequently, the pure and fretting fatigue tests (at 350 MPa and under 100 Hz of the frequency) were performed on as-cast and DLC-coated specimens to obtain the effect of coatings on the fatigue behaviors of the 16MnCr5 steel. Finally, the formation of the DLC layer and the fracture mechanisms were also briefly investigated using field-emission scanning electron microscopy. Then, the obtained results demonstrated that DLC coating ("DLC-B") increased the fatigue lifetime of 16MnCr5 steel by 47.7 % and 85.3 % in pure and fretting fatigue conditions, respectively. This layer can improve the surface properties of engineering materials and components, which can enhance the fatigue lifetime by increasing microhardness and compressive residual stress, reducing wear and friction, and improving adhesion between the substrate and coating. However, due to the white layer, the “DLC-A” improperly enhanced the material performance.

双相等离子氮化和类金刚石碳涂层中各种处理参数对活塞销 16MnCr5 钢高循环疲劳寿命和摩擦疲劳寿命的影响
本文研究了双相等离子氮化和类金刚石碳(DLC)涂层对从内燃机工业活塞销中提取的 16MnCr5 钢的纯疲劳和摩擦疲劳性能的影响。我们采用了两种不同的氮化和 DLC 涂层工艺:"DLC-A "和 "DLC-B"。拉曼光谱和显微硬度测试用于评估样品上 DLC 涂层的形成。随后,对原铸试样和 DLC 涂层试样进行了纯疲劳和摩擦疲劳试验(350 兆帕和 100 赫兹频率下),以了解涂层对 16MnCr5 钢疲劳行为的影响。最后,还使用场发射扫描电子显微镜简要研究了 DLC 层的形成和断裂机制。结果表明,DLC 涂层("DLC-B")使 16MnCr5 钢在纯疲劳和摩擦疲劳条件下的疲劳寿命分别提高了 47.7% 和 85.3%。该层可以改善工程材料和部件的表面性能,通过提高微硬度和压缩残余应力、减少磨损和摩擦以及改善基体和涂层之间的附着力来提高疲劳寿命。然而,由于白层的存在,"DLC-A "并不能很好地提高材料的性能。
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来源期刊
CiteScore
8.10
自引率
1.60%
发文量
128
审稿时长
66 days
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