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Elevated temperature erosive wear behavior of superalloy coatings deposited using cold spray technology
Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications ( IF 2.5 ) Pub Date : 2021-09-13 , DOI: 10.1177/14644207211037010
BV Padmini 1 , Mahantayya Mathapati 2 , HB Niranjan 1 , P Sampathkumaran 1 , S Anand Kumar 3 , G Padmavathi 4
Affiliation  

The boiler tube components in thermal power plants and steam generating systems suffer from erosion and corrosion problems and are even today posturing a grave threat to industries, resulting in forced outages. Unrelenting efforts to decrease the components’ maintenance costs have been made by protecting with coatings. Among the various coating methodologies are thermal spray, chemical vapour deposition (CVD), physical vapour deposition (PVD), etc., in vogue. However, recently, the additive manufacturing-based cold spray technique is gaining interest among material scientists, incorporating high-velocity impacts associated with the low-temperature regime. Nickel-based superalloy Inconel 625 has been chosen and cold sprayed on The American Society of Mechanical Engineers (ASME) T11 and T22 boiler steels. The coated surface is characterized by scanning electron microscopy and energy dispersive X-ray analysis (EDAX), X-ray diffraction, micro-hardness, and elemental X-ray mapping techniques. The solid particle erosion studies have been carried out both at room and an elevated temperature of 700 °C as per American Society for Testing and Materials (ASTM) standard for 30°C and 90 °C impact angles. An optical profilometer has been used to evaluate the erosion volume loss. The results showed that the coated samples exhibit superior erosion resistance than the uncoated samples at both room and elevated temperatures. The erosion data obtained have been substantiated using scanning electron microscopy by analyzing the damage features and correlating with the erosion data.



中文翻译:

使用冷喷涂技术沉积的高温合金涂层的高温侵蚀磨损行为

火力发电厂和蒸汽发生系统中的锅炉管部件遭受侵蚀和腐蚀问题,即使在今天也对工业构成严重威胁,导致被迫停电。通过使用涂层进行保护,已经做出了不懈的努力来降低组件的维护成本。在各种涂层方法中,流行的有热喷涂、化学气相沉积 (CVD)、物理气相沉积 (PVD) 等。然而,最近,基于增材制造的冷喷涂技术引起了材料科学家的兴趣,结合了与低温状态相关的高速影响。美国机械工程师协会 (ASME) 的 T11 和 T22 锅炉钢选择了镍基高温合金 Inconel 625 并进行冷喷涂。涂层表面通过扫描电子显微镜和能量色散 X 射线分析 (EDAX)、X 射线衍射、显微硬度和元素 X 射线映射技术进行表征。根据美国材料与试验协会 (ASTM) 标准,针对 30°C 和 90°C 的冲击角,在室温和 700°C 的高温下进行了固体颗粒侵蚀研究。光学轮廓仪已被用于评估侵蚀体积损失。结果表明,涂​​层样品在室温和高温下均表现出优于未涂层样品的耐腐蚀性。通过分析损伤特征并与侵蚀数据相关联,使用扫描电子显微镜证实了获得的侵蚀数据。显微硬度和元素 X 射线映射技术。根据美国材料与试验协会 (ASTM) 标准,针对 30°C 和 90°C 的冲击角,在室温和 700°C 的高温下进行了固体颗粒侵蚀研究。光学轮廓仪已被用于评估侵蚀体积损失。结果表明,涂​​层样品在室温和高温下均表现出优于未涂层样品的耐腐蚀性。通过分析损伤特征并与侵蚀数据相关联,使用扫描电子显微镜证实了获得的侵蚀数据。显微硬度和元素 X 射线映射技术。根据美国材料与试验协会 (ASTM) 标准,针对 30°C 和 90°C 的冲击角,在室温和 700°C 的高温下进行了固体颗粒侵蚀研究。光学轮廓仪已被用于评估侵蚀体积损失。结果表明,涂​​层样品在室温和高温下均表现出优于未涂层样品的耐腐蚀性。通过分析损伤特征并与侵蚀数据相关联,使用扫描电子显微镜证实了获得的侵蚀数据。根据美国材料与试验协会 (ASTM) 标准,针对 30°C 和 90°C 的冲击角,在室温和 700°C 的高温下进行了固体颗粒侵蚀研究。光学轮廓仪已被用于评估侵蚀体积损失。结果表明,涂​​层样品在室温和高温下均表现出优于未涂层样品的耐腐蚀性。通过分析损伤特征并与侵蚀数据相关联,使用扫描电子显微镜证实了获得的侵蚀数据。根据美国材料与试验协会 (ASTM) 标准,针对 30°C 和 90°C 的冲击角,在室温和 700°C 的高温下进行了固体颗粒侵蚀研究。光学轮廓仪已被用于评估侵蚀体积损失。结果表明,涂​​层样品在室温和高温下均表现出优于未涂层样品的耐腐蚀性。通过分析损伤特征并与侵蚀数据相关联,使用扫描电子显微镜证实了获得的侵蚀数据。

更新日期:2021-09-13
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