Development of in-situ SEM torsion tester for microscale materials. (June 2019)

• Record Type: Journal Article
• Authors: Chen, Bo; Yang, Rong; Dong, Jie; Wang, Sufang; Wang, Jun; Huan, Yong
• Is Part Of: Measurement. Volume 139(2019)
• Page Start: 421
• Page End: 425
• Publication Date: 2019-06
• Subjects: In-situ -- Torsion test -- Micro-scale -- Metallic glass wire; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2019.03.034
• Languages: English
• ISSNs: 0263-2241

Abstract

Graphical abstract: Highlights: The in-situ SEM torsion test technique for microscale materials was developed. In-situ SEM torsion test technique is a new way for studying microscale materials. It's the first time that measuring τ - γ curve and SEM observing simultaneously. Abstract: An in-situ SEM (scanning electron microscope) micro-torsion tester with high resolution is developed based on electromagnetism. The torque is controlled and measured using a coil-magnet component. The torsion angle is measured by a non-contact transducer based on Hall-effect. The calibration results show that the torque capacity of this tester is 1.6 × 10 −4 Nm with resolution of 1 × 10 −9 Nm. In-situ torsion test of MG (metallic glass) wire (Pd40 Cu30 Ni10 P20 ) with a diameter of 111 µm and a length of 3 mm is performed using this tester in SEM. A linear torque-torsion angle curve is obtained and the calculated shear modulus of the sample is 24.7 GPa. Meanwhile, the deformation process of the sample is simultaneously observed using SEM. It is the first time that the measurement of shear stress-strain and high resolution morphology observation are carried out simultaneously.