Real-time detection of cooling rate using pyrometers in tandem in laser material processing and directed energy deposition

2020 ◽  
Vol 277 ◽  
pp. 128330
Author(s):  
Amal M. Nair ◽  
Gopinath Muvvala ◽  
Sagar Sarkar ◽  
Ashish Kumar Nath
Keyword(s):  
Material Processing ◽  
Cooling Rate ◽  
Real Time ◽  
Energy Deposition ◽  
Laser Material Processing ◽  
Laser Material ◽  
Directed Energy Deposition ◽  
Real Time Detection ◽  
Directed Energy

Adaptive vision-based detection of laser-material interaction for directed energy deposition

2020 ◽  
Vol 36 ◽  
pp. 101468
Author(s):  
Mohamed A. Naiel ◽  
Deniz Sera Ertay ◽  
Mihaela Vlasea ◽  
Paul Fieguth
Keyword(s):  
Energy Deposition ◽  
Laser Material ◽  
Directed Energy Deposition ◽  
Directed Energy ◽  
Material Interaction

Alteration in the Phase Morphology of Ti-6Al-4V Alloy Produced Using Directed Energy Deposition

2020 ◽  
Vol 1000 ◽  
pp. 375-380
Author(s):  
Desrilia Nursyifaulkhair ◽  
Faris Arief Mawardi ◽  
Nokeun Park ◽  
Eung Ryul Baek ◽  
Sungwook Kim
Keyword(s):  
Cooling Rate ◽  
Energy Deposition ◽  
Bottom Layer ◽  
Transformation Products ◽  
Phase Morphology ◽  
Β Phase ◽  
Directed Energy Deposition ◽  
Fast Cooling ◽  
Directed Energy ◽  
Hardness Values

The alteration in phase morphology of Ti-6Al-4V alloy fabricated using directed energy deposition (DED) was investigated in this study. Owing to the fast cooling rate during DED, the specimen exhibited the diffusionless transformation products of martensite (α′) and massive (αm) phases. In the top layer, the α′ exhibited a needle-like morphology with the width of approximately 0.94 μm. Meanwhile, the αm presented a lamellar structure with α thickness of nearly 0.98 μm. In contrast, the morphology of α′ and αm started to decompose into α+β phase in the bottom layer. Furthermore, the hardness values increased with higher deposition layers. These phenomena could be explained by the effect of repetitive heating, as the nature of DED method during the depositing of new layers. Moreover, it was observed the α thickness of αm in the bottom layer was finer than that in the top layer due to the higher cooling rate.

Real-time focus control in broad flat field laser material processing

2008 ◽  
Vol 40 (2) ◽  
pp. 330-336 ◽  
Author(s):  
Jun Xie ◽  
Lide You ◽  
Shuhuai Huang ◽  
Zhengcheng Duan ◽  
Guoqing Chen
Keyword(s):  
Material Processing ◽  
Real Time ◽  
Laser Material Processing ◽  
Laser Material ◽  
Flat Field

Real-time laser-induced plasma monitoring in percussion pulsed laser material processing

Measurement ◽  
2019 ◽  
Vol 135 ◽  
pp. 905-912 ◽  
Author(s):  
Yuan-Jen Chang ◽  
Chih-Yuan Wang ◽  
Jin-Chen Hsu ◽  
Chao-Ching Ho ◽  
Chia-Lung Kuo
Keyword(s):  
Material Processing ◽  
Real Time ◽  
Pulsed Laser ◽  
Laser Material Processing ◽  
Laser Material ◽  
Laser Induced Plasma ◽  
Plasma Monitoring
Sign in / Sign up

Export Citation Format

Share Document