Scholarlink

<p>This paper presents the morphological and microstructural response of Jalore Pink Granite (JPG) under two laser-processing modes of a continuous-wave CO<sub>2</sub> laser: raster-mode scanning and manually controlled burst-mode pulsing. In scanning, laser power (70–90 W) and scan speed (50–150&#xa0;mm/s) influenced material removal (up to 0.014&#xa0;g), scan diameter, and morphological features. Higher power and lower speed promoted thermal accumulation, producing denser striations with thickness increasing from 0.072 to 0.097&#xa0;mm and spacing decreasing to 0.033&#xa0;mm. Associated surface effects included swelling, glazing, soot deposition, and ridge breakdown, with spatial variability highlighting the anisotropic thermo-physical behavior of JPG. In manual burst-mode pulsing (laser power: 10–90 W; burst repetitions: 10–100), the thermally influenced zone exhibited distinct morphologies. In general, four distinct thermal zones were observed, while in some cases, shattered glass, oil spillage, or smoky protrusions were observed. Quantitative analysis, performed to understand the diverse response of the thermally influenced zone, revealed a nonlinear correlation between the thermally influenced zone and the energy density, where a 3-degree cubic model performed best, with R<sup>2</sup> of 0.6242. Microstructural characterization confirmed localized melting, pore development, and granular degradation in irradiated regions (FESEM), along with persistent quartz phases and alterations in the diffraction pattern (XRD). These findings present laser irradiation as an effective method for controlled micro-structuring of granitoid rocks, emphasizing the importance of selecting the laser-processing mode and parameters, and considering rock anisotropy in governing surface modification during geological engineering applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigating Surface Modification Response Morphologies of Jalore Pink Granite During Laser Scanning and Manual Burst-Mode Repetitive Pulsing

  • 期刊论文

  • 发表日期：

    2026年2月12日

查看全文
  • Antash Kishore Sinha,
  • Shrikrishna N. Joshi

摘要

This paper presents the morphological and microstructural response of Jalore Pink Granite (JPG) under two laser-processing modes of a continuous-wave CO2 laser: raster-mode scanning and manually controlled burst-mode pulsing. In scanning, laser power (70–90 W) and scan speed (50–150 mm/s) influenced material removal (up to 0.014 g), scan diameter, and morphological features. Higher power and lower speed promoted thermal accumulation, producing denser striations with thickness increasing from 0.072 to 0.097 mm and spacing decreasing to 0.033 mm. Associated surface effects included swelling, glazing, soot deposition, and ridge breakdown, with spatial variability highlighting the anisotropic thermo-physical behavior of JPG. In manual burst-mode pulsing (laser power: 10–90 W; burst repetitions: 10–100), the thermally influenced zone exhibited distinct morphologies. In general, four distinct thermal zones were observed, while in some cases, shattered glass, oil spillage, or smoky protrusions were observed. Quantitative analysis, performed to understand the diverse response of the thermally influenced zone, revealed a nonlinear correlation between the thermally influenced zone and the energy density, where a 3-degree cubic model performed best, with R2 of 0.6242. Microstructural characterization confirmed localized melting, pore development, and granular degradation in irradiated regions (FESEM), along with persistent quartz phases and alterations in the diffraction pattern (XRD). These findings present laser irradiation as an effective method for controlled micro-structuring of granitoid rocks, emphasizing the importance of selecting the laser-processing mode and parameters, and considering rock anisotropy in governing surface modification during geological engineering applications.