pp. 1067-1075
S&M1268 Research Paper of Special Issue https://doi.org/10.18494/SAM.2016.1409 Published: September 21, 2016 Characteristics of the Thermal Strain of Gas Jet-Assisted Laser Percussion Drilling [PDF] Chao-Ching Ho, Yuan-Jen Chang, Jin-Chen Hsu, Chia-Lung Kuo,and Guan-Hong Lee (Received August 15, 2015; Accepted June 14, 2016) Keywords: hole drilling, residual thermal strain measurement, digital image correlation, ring-core method
In this work, a digital image correlation technique in combination with laser hole drilling tomeasure the residual thermal strain is presented. The significant potential benefits of this work arenon-contact, high speed, and on-line measurement. The ring-core based groove in the surface of aspecimen was drilled concentrically to induce thermal stresses inside the core. These deformationscan be measured by a digital image correlation technique for measuring relieved strains. We alsoinvestigated the size of the reference areas on the specimens and tracked these areas after the laserhole drilling process. The proposed method was applied to characterize the thermal effect producedby laser milling for aluminum alloy Al5052 under plane strain tension conditions, and the resultswere compared with four assisted laser milling approaches.
Corresponding author: Chao-Ching HoCite this article Chao-Ching Ho, Yuan-Jen Chang, Jin-Chen Hsu, Chia-Lung Kuo,and Guan-Hong Lee, Characteristics of the Thermal Strain of Gas Jet-Assisted Laser Percussion Drilling, Sens. Mater., Vol. 28, No. 9, 2016, p. 1067-1075. |