Surface fracture behavior and subsurface damage of polycrystalline yttrium aluminum garnet ceramics in Vickers indentation

• DOI: 10.1016/j.jmrt.2023.08.297
• Publication Date: 2023-09-04T05:12:17Z
• Authors: Hang Yin; Sheng Wang; Qingliang Zhao; Jian Zhang; Xiaojian Mao; Bing Guo
• Keywords: Indentation; Transgranular fracture

In this paper, the Vickers indentation experiments were carried out under different loads on polished surface of polycrystalline yttrium aluminum garnet (YAG) ceramics to investigate fracture behavior and subsurface damage quasi-static conditions. The YAG ceramic was corroded for intuitively observing load, method section polishing combined with chemical corrosion used examine damage. Johnson-Holmquist (JH-2) material model established imported into Abaqus software simulate process indentation, so as predict depth load. results show that divided two stages increase loads, is, toughness value increased gradually mainly transgranular in loading range 0.05-0.3kgf. decreased obviously intergranular when load 0.3-1kgf. simulation values length are highly consistent experimental accuracy verified, which has an important guiding predicting ultra-precision grinding ceramics.