اثر تغییر توان لیزر در فرایند AM-LMD بر پروفیل رسوب پودر اینکونل 718 بروی اینکونل 738

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری تخصصی مهندسی مواد، واحدکرج، دانشگاه آزاداسلامی، کرج، ایران

2 گروه مهندسی مواد و متالورژی، واحد کرج، دانشگاه آزاداسلامی، کرج، ایران

3 گروه مهندسی مکانیک، واحد علوم و تحقیقات تهران، دانشگاه آزاداسلامی، تهران، ایران

چکیده

این تحقیق با هدف بررسی تأثیر تغییر توان لیزر بر مشخصات فصل مشترک در فرایند ساخت افزودنی (AM) با رسوب نشانی پودر اینکونل 718 بر روی زیرلایه از جنس اینکونل 738 به منظور بازسازی پره های معیوب توربین با رویکرد اقتصاد چرخشی انجام شد. رسوب فلز با لیزر (LMD) یک تکنیک ساخت لایه به لایه است که برای ساخت و تعمیر قطعات حیاتی و استراتژیک استفاده می‌­شود. برای این منظور، رسوب نشانی با توان مختلف 150، 250 و 350 وات بر روی زیرلایه، انجام پذیرفت. برخی از ویژگی‌­ها مانند ابعاد هندسی، تعداد پالس­‌ها در هر لایه و ریزساختار نمونه­‌ها مورد مطالعه قرار گرفت. با مقایسه نتایج، مشخص شد که با افزایش توان، یکپارچگی، ضخامت فصل مشترک و عمق ذوب زیرلایه افزایش می‌یابد. در مقابل، با افزایش توان، تخلخل سطحی، انحراف اندازه از ابعاد طراحی و تعداد پالس‌ها برای تکمیل هر لایه کاهش می‌یابد. هر لایه رسوب نشانی با توان 150، 250 و 350 وات به ترتیب با 17، 11 و 9 پالس تکمیل گردید. با افزایش توان از 150 وات به 350 وات، تخلخل سطحی حدود 90% کاهش یافت.

کلیدواژه‌ها

عنوان مقاله [English]

Effect of laser power variation in AM-LMD process on Inconel 718 powder deposition profile on Inconel 738

نویسندگان [English]

  • Rasoull Hedayatnejad 1
  • Hamed Sabet 2
  • Sadegh Rahmati 3
  • Ali Salemi Golezani 2
1 Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran
2 Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran
3 Department of Mechanical and Aerospace Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
چکیده [English]

The aim of this study was to investigate the effect of laser power variation on joint connection characteristics in the additive manufacturing (AM) process by depositing Inconel 718 powder on an Inconel 738 substrate in order to reconstruct defective gas turbine blades with a circular economy approach. Laser metal deposition (LMD) is a layer-by-layer fabrication technique used to manufacture and reconstruct critical and strategic parts. For this purpose, deposition with different power of 150, 250 and 350 watts was performed on the substrate. Some features such as geometric dimensions, number of pulses per layer and microstructure of the samples were studied. Comparing the results, it was found that with increasing strength, integrity, joint connection thickness and substrate melting depth increase. In contrast, with increasing power, surface porosity, and size deviation from the design dimensions, and the number of pulses to complete each layer decrease. Each deposition layer with power of 150, 250 and 350 watts was completed with 17, 11 and 9 pulses, respectively. By increasing the power from 150 watts to 350 watts, the surface porosity decreased by about 90%.

کلیدواژه‌ها [English]

  • Additive Manufacturing
  • Laser Metal Deposition
  • Power
  • Superalloy
  • Inconel

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مهندسی ساخت و تولید ایران
دوره 9، شماره 4
تیر 1401
صفحه 1-11

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