Influence of repetitive pulsed laser irradiation on the surface characteristics of an aluminum alloy in the melting regime
http://link.springer.com/article/10.1007%2Fs12206-014-1131-1
Influence of repetitive pulsed laser irradiation on the surface characteristics of an aluminum alloy in the melting regime
Abstract
We have investigated the influence of repetitive near-infrared (NIR) pulsed laser shots in the melting regime on the surface characteristics of an aluminum 6061-T6 alloy. Characteristics of interest include surface morphology, surface roughness, and surface hardness in the melted zone as well as the size of the melted zone. For this study, the proper pulse energy for inducing surface melting at one shot is selected using numerical simulations that calculate the variation in temperature at the laser beam spot for various input pulse energies in order to find the proper pulse energy for raising the temperature to the melting point. In this study, 130 mJ was selected as the input energy for a Nd:YAG laser pulse with a duration of 5 ns. The size of the melted zone measured using optical microscopy (OM) increased logarithmically with an increasing shot number. The surface morphology observed by scanning electron microscopy (SEM) clearly showed a re-solidified microstructure evolution after surface melting. The surface roughness and hardness were measured by atomic force microscopy (AFM) and nano-indentation, respectively. The surface roughness showed almost no variation due to the surface texturing after laser shots over 10. The hardness inside the melted zone was lower than that outside the zone because the β″ phase was transformed to a β phase or dissolved into a matrix.
Keywords
Near-infrared pulsed laser Aluminum alloy Melting Surface morphology Surface roughness Surface hardness-
In-situ and Layer-by-layer Grain Size Estimation of Additively Manufactured Metal Components using Femtosecond Laser Ultrasonic Technique (Submitted)
Date2022.02.21 CategoryInternational Views953 -
Indirect Method for Measuring Absolute Acoustic Nonlinearity Parameter Using Surface Acoustic Waves with a Fully Non-Contact Laser-Ultrasonic Technique
Date2021.08.25 CategoryInternational Views31738 -
Influence of laser beam profiles on the frequency bandwidth of laser-generated surface acoustic waves
Date2015.09.16 CategoryInternational Views121924 -
Influence of repetitive pulsed laser irradiation on the surface characteristics of an aluminum alloy in the melting regime
Date2015.09.16 CategoryInternational Views282658 -
Influence of slit width on harmonic generation in ultrasonic surface waves excited by masking a laser beam with a line arrayed slit
Date2014.03.05 CategoryInternational Views127887 -
Initiation time of near-infrared laser-induced slip on the surface of silicon wafers
Date2014.09.29 CategoryInternational Views112412 -
Internal defect detection using laser-generated longitudinal waves in ablation regime
Date2018.11.29 CategoryInternational Views108909 -
Laser ultrasonic inspection in ablation regime
Date2015.09.16 CategoryInternational Views132398 -
Measurement of Absolute Acoustic Nonlinearity Parameter Using Laser-Ultrasonic Detection
Date2021.08.25 CategoryInternational Views43330 -
Mechanical properties estimation of additively manufactured metal components using femtosecond laser ultrasonics and laser polishing
Date2021.08.25 CategoryInternational Views28957 -
Microstructural Characterization of Additively Manufactured Metal Components Using Linear and Nonlinear Ultrasonic Techniques
Date2022.02.21 CategoryInternational Views1273 -
Nanotribological and wetting performance of hierarchical patterns
Date2016.02.23 CategoryInternational Views123509 -
NDE of low-velocity impact damages in composite laminates using ESPI, digital shearography and ultrasound C-scan techniques
Date2014.03.05 CategoryInternational Views96599 -
Non-Contact Evaluation of Acoustic Nonlinearity of a Laser-Generated Surface Wave in a Plastically Deformed Aluminum Alloy
Date2015.09.16 CategoryInternational Views160166 -
Non-contact Measurement of Elastic Modulus by using Laser Ultrasonic
Date2015.09.16 CategoryInternational Views232718 -
Non-contact Single-Mode Guided Wave Technique by the Combination of Wavelength-Matched Laser Generation and Angle-Matched Leak Wave Detection
Date2012.05.03 CategoryInternational Views183064 -
Nondestructive evaluation of micro-oxide inclusions in additively manufactured metal parts using nonlinear ultrasonic technique
Date2021.08.25 CategoryInternational Views20110 -
Nondestructive Evaluation of Thermal Aging in Al6061 Alloy by measuring Acoustic Nonlinearity of Laser-generated Surface Acoustic Waves
Date2020.01.06 CategoryInternational Views66374 -
Nondestructive Inspection of Cylindrical Components Repaired Via Directed Energy Deposition Using Scanning Acoustic Microscopy with Metal Lubricants
Date2024.03.19 CategoryInternational Views317 -
Nondestructive Inspection of Directed Energy Deposited Components Using Scanning Acoustic Microscopy with Metalworking Fluids
Date2024.03.19 CategoryInternational Views42