In-Service Oxidation and Microstructural Evolution of a Nickel Superalloy in a Formula 1 Car Exhaust
In-Service Oxidation and Microstructural Evolution of a Nickel Superalloy in a Formula 1 Car Exhaust
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一级方程式赛车尾气中镍高温合金的使用中氧化和微观结构演变
DOI：
10.1007/s11085-017-9792-7
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发表时间：
2018
影响因子：
2.2
通讯作者：
P. Bagot
中科院分区：
文献类型：
--
作者：
S. Pedrazzini;E. Kiseeva;R. Escoube;H. Gardner;J. Douglas;A. Radecka;P. Mignanelli;G. Hughes;G. Chapman;P. Edmondson;H. Stone;D. De Lille;P. Bagot
采用先进的电子显微镜技术、原子探针断层扫描技术和高灵敏度激光烧蚀质谱技术，研究了暴露在赛车环境中的英科耐尔625合金排气歧管的氧化响应和微观结构演变。动态、腐蚀性气体条件导致氧化加速，内排气表面也受到Zn、P、K、Na等多种物质的严重污染。在对照样品中发现的Nb碳化物和Ti氮化物在暴露过程中演变成混合（Ti, Nb）N，并被较小的富Mo， si沉淀装饰。因此，外露的合金部件在使用后显示出独特的表面和地下特征。
The oxidation response and microstructural evolution of an Inconel 625 alloy exhaust manifold exposed to an automobile racing environment has been examined using a range of advanced electron microscopy-based techniques, atom probe tomography and high-sensitivity laser ablation mass spectrometry. The dynamic, corrosive gas conditions result in accelerated oxidation, with the inner exhaust surface also heavily contaminated by multiple species including Zn, P, K and Na. Nb carbides and Ti nitrides identified in stock control samples evolve into mixed (Ti, Nb)N species during exposure, decorated by smaller Mo, Si-rich precipitates. The exposed alloy component therefore reveals unique surface and subsurface features following in-service use.