A Fracture Analysis of Ti-10Mo-8V-1Fe-3.5Al Alloy Screws during AssemblyReport as inadecuate


A Fracture Analysis of Ti-10Mo-8V-1Fe-3.5Al Alloy Screws during Assembly


A Fracture Analysis of Ti-10Mo-8V-1Fe-3.5Al Alloy Screws during Assembly - Download this document for free, or read online. Document in PDF available to download.

1

Science and Technology on Reliability and Environment Engineering Laboratory, Beihang University, Beijing 100191, China

2

Beijing Institute of Aeronautical Materials, Beijing 100095, China





*

Author to whom correspondence should be addressed.



Academic Editor: Javier Narciso

Abstract Titanium screws have properties that make them ideal for applications that require both a high strength-to-weight ratio and corrosion resistance, such as fastener applications for aviation and aerospace. The fracture behavior of Ti-10Mo-8V-1Fe-3.5Al TB3 alloy screws during assembly was explored. Besides visual examination, other experimental techniques used for the investigation are as follows: 1 fracture characteristics and damage morphology via scanning electron microscopy SEM; 2 chemical constituents via energy dispersive spectroscopy EDS and hydrogen concentration testing; 3 metallographic observation; 4 stress durability embrittlement testing; and 5 torsion simulation testing. Results show that the fracture mode of the screws is brittle. There is no obvious relation to hydrogen-induced brittle. The main reason for the fracture of titanium alloy screws is internal defects, around which oxygen content is high, increasing brittleness. The internal defects of screws result from grain boundary cracking caused by hot forging. View Full-Text

Keywords: titanium alloy; screw; brittle fracture; internal defect; grain boundary cracking titanium alloy; screw; brittle fracture; internal defect; grain boundary cracking





Author: Weifang Zhang 1,2, Yuanxing Huang 1, Wei Dai 1,* , Xiaoshuai Jin 1 and Chang Yin 1

Source: http://mdpi.com/



DOWNLOAD PDF




Related documents