Improving the precision of Vickers indentation measurements in soda-lime glass with increased dwell time

Field strength effect on elastoplastic behavior of aluminoborosilicate glass: II. Volumetric recovery

“…If a researcher is facing a time or equipment restriction so measuring a full hardness‐load curve is not viable for all compositions, it is recommended to use a load that produces a sufficiently large imprint that is optically well resolved (during indentation and topography measurements) but not so high as to induce substantive cracking. Track and maintain consistent indentation parameters such as dwell time, postindentation observation or delay time, and atmosphere (temperature and humidity). Weeks and Flores 85 investigated the effects of dwell time and postindentation observation time. They concluded that a combination of low loads and short dwell times leads to imprecise measurement of both diagonal length and cracking (for crack resistance or indentation fracture toughness).…”

“…The impact of increasing delay time on the number of cracks observed decreased as the applied load was increased from F = 0.05 to F = 0.2 kgf, but the opposite was true for crack length. Weeks and Flores 85 concluded that using higher loads and/or longer dwell times can help reduce data distribution and associated errors. Bechgaard et al 86 .…”

“…Track and maintain consistent indentation parameters such as dwell time, postindentation observation or delay time, and atmosphere (temperature and humidity). Weeks and Flores 85 investigated the effects of dwell time and postindentation observation time. They concluded that a combination of low loads and short dwell times leads to imprecise measurement of both diagonal length and cracking (for crack resistance or indentation fracture toughness).…”