Open AccessFailure analysis of sensor diaphragm cracking
Author(s) -
Kong Huan-ping,
Delin Liu,
Changkui Liu
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1907/1/012024
Subject(s) - materials science , diaphragm (acoustics) , cracking , grain boundary , bending , structural engineering , enhanced data rates for gsm evolution , composite material , stress concentration , metallurgy , fracture mechanics , microstructure , vibration , engineering , acoustics , telecommunications , physics
The sensor diaphragm cracked during the test project. Through macro and micro morphology observation, metallographic examination and hardness test, the diaphragm failure properties and reasons were determined. The results showed that the failure nature of the faulted diaphragm was bidirectional bending fatigue cracking. 1# crack failure was related to the greater bending stress borne at the bottom of the outermost corrugation. 2# crack failure was related to the greater stress borne by the root at the boundary between the outermost corrugation and the outer edge, the appearance of grain boundaries caused by the pickling process promoted the initiation and propagation of 2# crack.