Numerical study of pile-up in bulk metallic glass during spherical indentation

• 来源期刊: 中国科学G辑（英文版）
• 年，卷（期）: 2008,（4）
• 页码范围: 379-386
• 页数: 8页
• 语种: 英文
• DOI: 10.1007/s11433-008-0043-4

摘要

Pile-up around indenter is usually observed during instrumented indentation tests on bulk metallic glass. Neglecting the pile-up effect may lead to errors in evaluating hardness, Young's modulus, stress-strain response, etc. Finite element analysis was employed to implement numerical simulation of spherical indentation tests on bulk metallic glass. A new model was proposed to describe the pile-up effect. By using this new model, the contact radius and hardness of Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass were obtained under several different indenter loads with pile-up, and the results agree well with the data generated by numerical simulation.