A morphological and textural analysis of Inconel-718 aerospace alloy processed through electrical discharging machining

IF 2.7 4区 工程技术 Q2 ENGINEERING, MANUFACTURING Machining Science and Technology Pub Date : 2021-09-03 DOI:10.1080/10910344.2021.1971715
K. Biswas, Shirsendu Das, Swarup Paul, B. Doloi
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引用次数: 1

Abstract

Abstract The Inconel 718 has captured global attention for its huge applications in the aerospace and defense field. However, a limited approach is noticed to investigate this material's responses and morphological features after electrical discharge machining operation. This study wants to offer a more detailed investigating approach, including the analysis of morphological features, recast layer, microhardness, elemental composition, and several textural defects and basic responses. Scanning electron microscopy is used to investigate several textural features, defects, cracks, and recast layers. The findings claim 538 nm–2.168 µm and 14–41 µm variations in crack width and recast thickness, respectively, which increase with pulse current and pulse on-time. However, the low discharge energy can provide better micro-hardness than higher discharge conditions due to having sufficient time for flushing and heat dissipations. The recast surface and the interfaces are, respectively, 7.58%–13.16% and 22.75%–32.74% harder with low discharge condition than the intermediate and higher discharge condition. Moreover, the Energy Dispersive X-ray analysis reported the emigration of 17.81% of carbon and 0.33% of copper from the dielectric and tool during the machining.
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放电加工Inconel-718航空合金的形貌和织构分析
因科乃尔718因其在航空航天和国防领域的广泛应用而受到全球关注。然而,研究这种材料在放电加工后的响应和形态特征的方法有限。本研究希望提供一种更详细的研究方法,包括形貌特征、重铸层、显微硬度、元素组成以及几种织构缺陷和基本响应的分析。扫描电子显微镜用于研究几种纹理特征、缺陷、裂纹和重铸层。结果表明,裂纹宽度和重铸厚度随脉冲电流和脉冲导通时间的增加而变化,分别为538 nm ~ 2.168 μ m和14 ~ 41 μ m。然而,由于低放电能量有足够的时间进行冲洗和散热,因此可以提供比高放电条件更好的显微硬度。低放电条件下,重铸表面和界面硬度分别比中等和高放电条件下高7.58% ~ 13.16%和22.75% ~ 32.74%。此外,能量色散x射线分析表明,在加工过程中,介质和刀具中有17.81%的碳和0.33%的铜析出。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Machining Science and Technology
Machining Science and Technology 工程技术-材料科学:综合
CiteScore
5.70
自引率
3.70%
发文量
18
审稿时长
6 months
期刊介绍: Machining Science and Technology publishes original scientific and technical papers and review articles on topics related to traditional and nontraditional machining processes performed on all materials—metals and advanced alloys, polymers, ceramics, composites, and biomaterials. Topics covered include: -machining performance of all materials, including lightweight materials- coated and special cutting tools: design and machining performance evaluation- predictive models for machining performance and optimization, including machining dynamics- measurement and analysis of machined surfaces- sustainable machining: dry, near-dry, or Minimum Quantity Lubrication (MQL) and cryogenic machining processes precision and micro/nano machining- design and implementation of in-process sensors for monitoring and control of machining performance- surface integrity in machining processes, including detection and characterization of machining damage- new and advanced abrasive machining processes: design and performance analysis- cutting fluids and special coolants/lubricants- nontraditional and hybrid machining processes, including EDM, ECM, laser and plasma-assisted machining, waterjet and abrasive waterjet machining
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