?

단축키

이전 문서

다음 문서

+ - Up Down Comment Print
?

단축키

이전 문서

다음 문서

+ - Up Down Comment Print

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

  • Sungho Choi
  • , Kyung-Young Jhang 

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

분류 제목 조회 수
International Internal defect detection using laser-generated longitudinal waves in ablation regime     2107
International Synthetic aperture imaging of contact acoustic nonlinearity to visualize the closing interfaces using tone-burst ultrasonic waves     2577
Domestic Variation of Acoustoelastic Effect in Al6061-T6 according to Heat Treatment Time     2608
International Dependence of Nonlinear Ultrasonic Characteristic on Second-Phase Precipitation in Heat-Treated Al 6061-T6 alloy     2585
International Relative Measurement of the Acoustic Nonlinearity Parameter using Laser Detection of an Ultrasonic Wave  fileimage   10523
International A Method to Estimate the Absolute Ultrasonic Nonlinearity Parameter from Relative Measurements  fileimage   10806
International Finite element analysis of a low-velocity impact test for glass fiber-reinforced polypropylene composites considering mixed-mode interlaminar fracture toughness  fileimage   10909
International Assessment of Thermal Degradation by Cumulative Variation of Ultrasonic Nonlinear Parameter     50654
International Assessment of Thermal Aging of Aluminum Alloys by Acoustic Nonlinearity Measurement of Surface Acoustic Waves     47747
International Absolute Measurement and Relative Measurement of Ultrasonic Nonlinear Parameter     47822
International Experimental Comparison of Nonlinear Parameters Obtained from Absolute Measurement and Relative Measurement     46775
International Comparison of Ultrasonic Nonlinear Parameters Measured by PZT and LiNbO3 Transducers     47612
International Nanotribological and wetting performance of hierarchical patterns     48044
International Demonstration of Disturbance Propagation and Amplification in Car-Following Situation for Enhancement of Vehicle Platoon System     50746
International Relative Measurement of Acoustic Nonlinear Parameters and Comparison of Sensitivity to Thermal Aging     49591
International Non-contact Measurement of Elastic Modulus by using Laser Ultrasonic     52500
International Relationship between Second- and Third-order Acoustic Nonlinear Parameters in Relative Measurement     48325
International Non-Contact Evaluation of Acoustic Nonlinearity of a Laser-Generated Surface Wave in a Plastically Deformed Aluminum Alloy     48852
International Influence of repetitive pulsed laser irradiation on the surface characteristics of an aluminum alloy in the melting regime     49771
International Real-time detection of surface cracks on silicon wafers during laser beam irradiation     49486
Board Pagination ‹ Prev 1 2 3 4 5 6 7 8 9 Next ›
/ 9
Designed by hikaru100

나눔글꼴 설치 안내


이 PC에는 나눔글꼴이 설치되어 있지 않습니다.

이 사이트를 나눔글꼴로 보기 위해서는
나눔글꼴을 설치해야 합니다.

설치 취소

SketchBook5,스케치북5

SketchBook5,스케치북5

SketchBook5,스케치북5

SketchBook5,스케치북5

ISNDE Laboratory
203-2,Engineering Center Annex
Hanyang University,
222 Wangsimni-ro, Seongdong-gu
Seoul 04763, Korea
04763 서울특별시 성동구 왕십리로 222
한양대학교 공업센터 별관 203-2호
지능계측 및 비파괴평가 연구실
Tel: 02 - 2220 - 4220
Fax: 02 - 2299 - 7207