Lazer destekli imalatta plazma dinamiklerinin teorik ve deneysel olarak araştırılması

Year 2017, Volume: 23 Issue: 8, 1009 - 1013, 28.12.2017

Serap Çelen

Abstract

Lazer
destekli mikro-imalat (mikro kaynak, delme, yüzey yapılandırma vb…) prosesinin
kalitesi elektronik, havacılık- uzay ve biyomedikal endüstrileri için özel bir
öneme sahiptir. Lazerin oluşturduğu plazmanın dinamikleri lazer güç yoğunluğu,
ışın odak çapı ve çevre koşulları tarafından belirlenmektedir. Plazma yoğunluğunda
eşik değerine ulaşıldığında plazma korumasına bağlı ışınım kayıpları sebebiyle,
lazer enerjisi malzemeye aktarılamamaktadır. Bu ayrışma eşiği mikro-imalat
operasyonu için kritik bir role sahiptir. Bu makale kapsamında, titanyum
malzeme için plazma dinamikleri teorik ve deneysel olarak incelenmiş ve faydalı
prosess enerjisinin kaybını önlemek için optimum lazer yoğunluk eşiği rapor
edilmiş ve numerik çalışmalarla karşılaştırılmıştır. 

Keywords

Lazerden kaynaklanan patlama dalgaları, plazma fiziği, mikro imalat

Theoretical and experimental investigation of plasma dynamics for laser-induced machining mechanism

Abstract

The
quality of laser micro-machining process (micro welding, drilling, surface
structuring etc…) has vital importance for electronic, aviation-aerospace and
biomedical industries. Dynamics of laser-induced plasma are determined with
some parameters such as laser intensity, beam waist diameter and ambient gas
conditions. When the plasma density is limited with a threshold value, the
laser energy can not transmitted to the material due to the rarefied plasma.
This decoupling threshold has a crucial role for micro-machining operation. In
the scope of this paper, the behaviour of the plasma dynamics has been examined
both theoretically and experimentally for titanium material and optimal laser
intensity threshold was reported to prevent dissipation of beneficial process
energy and to compare numerical investigations.

Keywords

Laser-induced detonation waves, Plasma physics, Micro machining

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