Laser ablation of titanium alloy under a thin and flowing water layer

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Tangwarodomnukun V., Likhitangsuwat P., Tevinpibanphan O., Dumkum C.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2015

วารสาร: International Journal of Machine Tools and Manufacture (0890-6955)

Volume number: 89

หน้าแรก: 14

หน้าสุดท้าย: 28

จำนวนหน้า: 15

นอก: 0890-6955

eISSN: 1879-2170

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911908376&doi=10.1016%2fj.ijmachtools.2014.10.013&partnerID=40&md5=c076c698c40a999d27bcc054b494bbd3

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

Underwater laser ablation has become an alternative machining process that is able to reduce the thermal damage in work materials caused by lasers. However, the disturbance of water to the laser beam is a crucial concern for the ablation performance in water and cut surface quality obtained. In this study, a new laser ablation technique has been proposed, in which a waterjet was applied to impinge the top workpiece surface in order to form a thin and flowing water layer. With the assist of such water layer during the laser ablation, the redeposition and heat-affected zone can be minimized. Titanium alloy (Ti-6Al-4V) selected as a work sample was grooved by using a nanosecond-pulse laser under different machining conditions. The cut geometry and heat-affected zone were observed and analyzed to justify the process performance. The metallurgical change and cracks that occurred on and underneath the groove surface were also investigated in this study. The experimental results revealed that a clean cut with less thermal damage can be obtained when the workpiece was ablated by a laser under the flowing water layer. In addition, a narrower and deeper groove can be fabricated when a higher waterjet flow rate was applied. The laser ablation under the flowing water layer developed in this study could be a potential method for machining titanium alloy or even other thermal-sensitive materials. ฉ Elsevier Ltd. All rights reserved.

คำสำคัญ

Ablation, Heat-affected zone, Titanium alloy