Open AccessMicrostructure and fatigue properties of TC4 titanium alloy treated by α+β forging process
Author(s) -
Wenting Cui,
Xuan Chen,
Cheng Li,
Jian Ding,
Changkai Wang,
Bohan Wang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/772/1/012075
Subject(s) - forging , microstructure , materials science , titanium alloy , metallurgy , cleavage (geology) , fatigue testing , low cycle fatigue , alloy , structural engineering , composite material , engineering , fracture (geology)
As aero engine life increases, blade fatigue has become one of the key factors restricting the high reliability and long service life of aero engine. In this paper, TC4 bar was treated by α+β forging process. The microstructure and mechanical properties of the treated material were observed and tested at room temperature, and the three point bending ultrasonic fatigue test was carried out. The results show that the S-N curve of the α+β forging material presents a double platform shape. The high cycle showed surface cleavage mode, the very high cycle showed internal cleavage mode, and the very high cycle cracks originated from the primary phase cleavage plane.