Work

Fracture mode of Ti(C, N)-based cermets investigated by experiment and simulation calculation

Year: 2024

Type: article

Abstract: The high hardness and good wear resistance of Ti(C, N)-based cermets confer excellent applicability as cutting tools. However, the lack of in-depth research on the fracture mechanism limits further improvements in toughness. A typical commercial Ti(C, N)-based cermet with a core–rim structure was prepared through low-pressure sintering. The interface characteristics between the complex core, rim, and binder phases were characterized using transmission electron microscopy (TEM), while the actual hardness and modules of these phases were measured through in-situ nanoindenter assessments. The crack propagation behaviour of the cermet was analyzed using a 70° angle observation method combined with electron backscatter diffraction in scanning electron microscopy (EBSD/SEM). This study identifies a commonly occurring but long-overlooked fracture mode, termed “trans-rim” fracture. The experimental results were verified through simulation calculations. This novel idea offers insights into enhancing the toughness of Ti(C, N)-based cermets .

Source: Ceramics International

DOI: 10.1016/j.ceramint.2024.10.192

Authors: Guangrui Wang, Bin Wang, Xianquan Jiang, Dongyu Shangguan, Jie Wang

Institutions: Southwest University, Xinxiang University

Language: English

Topic: Advanced materials and composites

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,440

Funders: National Natural Science Foundation of China, Hubei University of Technology, Tsinghua University, Sichuan University