Investigation of Fatigue Properties of Titanium Alloy Applying Variational Infrared Thermography

2013 ◽  
pp. 171-176
Author(s):  
P. J. Hou ◽  
X. L. Guo ◽  
J. L. Fan
Keyword(s):  
Titanium Alloy ◽  
Infrared Thermography ◽  
Fatigue Properties

scholarly journals Effect of Ultrasonic Surface Impact on the Fatigue Properties of Ti3Zr2Sn3Mo25Nb

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2107
Author(s):  
Zhangjianing Cheng ◽  
Xiaojian Cao ◽  
Xiaoli Xu ◽  
Qiangru Shen ◽  
Tianchong Yu ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fatigue Strength ◽  
Fatigue Cracks ◽  
Dislocation Motion ◽  
Fatigue Properties ◽  
Surface Residual Stress ◽  
Initiation Zone ◽  
Rotating Bending Fatigue ◽  
Average Size ◽  
Grain Surface

The effect of nano grain surface layer generated by ultrasonic impact on the fatigue behaviors of a titanium alloy Ti3Zr2Sn3Mo25Nb (TLM) was investigated. Three vibration strike-numbers of 24,000 times, 36,000 times and 48,000 times per unit are chosen to treat the surface of TLM specimens. Nanocrystals with an average size of 30 nm are generated. The dislocation motion plays an important role in the transformation of nanograins. Ultrasonic surface impact improves the mechanical properties of TLM, such as hardness, surface residual stress, tensile strength and fatigue strength. More vibration strike numbers will cause a higher enhancement. With a vibration strike number of 48,000 times per square millimeter the rotating-bending fatigue strength of TLM at 107 cycles is improved by 23.7%. All the fatigue cracks initiate from the surface of untreated specimens, while inner cracks appear after the fatigue life of 106 cycles with the ultrasonic surface impact. The crystal slip in the crack initiation zone is the main way of growth for microcracks. Crack cores are usually formed at the junction of crystals. The stress intensity factor of TLM titanium alloy is approximately 7.0 MPa·m1/2.

scholarly journals Corrosion and Corrosion Fatigue Properties of Additively Manufactured Magnesium Alloy WE43 in Comparison to Titanium Alloy Ti-6Al-4V in Physiological Environment

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2892 ◽  
Author(s):  
Nils Wegner ◽  
Daniel Kotzem ◽  
Yvonne Wessarges ◽  
Nicole Emminghaus ◽  
Christian Hoff ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fatigue Strength ◽  
Magnesium Alloy ◽  
Corrosion Fatigue ◽  
Fatigue Properties ◽  
Test Duration ◽  
Medical Sector ◽  
Manufacturing Techniques ◽  
Alloy We43 ◽  
Application Fields

Laser powder bed fusion (L-PBF) of metals enables the manufacturing of highly complex geometries which opens new application fields in the medical sector, especially with regard to personalized implants. In comparison to conventional manufacturing techniques, L-PBF causes different microstructures, and thus, new challenges arise. The main objective of this work is to investigate the influence of different manufacturing parameters of the L-PBF process on the microstructure, process-induced porosity, as well as corrosion fatigue properties of the magnesium alloy WE43 and as a reference on the titanium alloy Ti-6Al-4V. In particular, the investigated magnesium alloy WE43 showed a strong process parameter dependence in terms of porosity (size and distribution), microstructure, corrosion rates, and corrosion fatigue properties. Cyclic tests with increased test duration caused an especially high decrease in fatigue strength for magnesium alloy WE43. It can be demonstrated that, due to high process-induced surface roughness, which supports locally intensified corrosion, multiple crack initiation sites are present, which is one of the main reasons for the drastic decrease in fatigue strength.

The Effects of Machined Workpiece Surface Integrity on the Fatigue Life of TC21 Titanium Alloy

2012 ◽  
Vol 503-504 ◽  
pp. 382-389 ◽  
Author(s):  
Dong Xing Du ◽  
Dao Xin Liu ◽  
Yu Feng Sun ◽  
Jin Gang Tang ◽  
Xiao Hua Zhang
Keyword(s):  
Residual Stress ◽  
Titanium Alloy ◽  
Fatigue Life ◽  
Surface Integrity ◽  
Surface Profile ◽  
Fatigue Properties ◽  
Profile Measurement ◽  
Micro Hardness ◽  
Finish Turning ◽  
Rough Turning

In this paper, the influence of different machining methods (including rough turning, finish turning, and longitudinal polishing after finish turning) on rotating bending fatigue properties of TC21 which belonged to a new ultra high strength titanium alloy was studied. The influence of machining methods on surface integrity of TC21 titanium alloy was measured by using surface profile measurement, scanning electron microscopy, metallography microscope, micro-hardness instrument and X-ray diffraction residual stress analyzer. And fatigue fractography of specimens was further investigated. Then the mechanism of fatigue resistance which was affected by machining surface integrity was discussed. The results indicated that the fatigue life of finish turning and longitudinal polishing after finish turning was increased 3.96 times and 17.34 times compared with rough turning, respectively. The machining surface integrity had important influence on fatigue property of TC21 titanium alloy, which caused by the differences of surface roughness and texture as the dominant factors, and then the variation in surface micro-hardness, metallographic microstructure and the surface residual stress were not the main factors on three above-mentioned machining methods. By using longitudinal polishing after finish turning processing method for preparation of TC21 titanium alloy parts could ensure good surface integrity and excellent fatigue performance.

Low-cycle fatigue properties of a titanium alloy exhibiting nonlinear elastic deformation behavior

2011 ◽  
Vol 59 (11) ◽  
pp. 4690-4699 ◽  
Author(s):  
S.Q. Zhang ◽  
S.J. Li ◽  
M.T. Jia ◽  
F. Prima ◽  
L.J. Chen ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Elastic Deformation ◽  
Deformation Behavior ◽  
Low Cycle Fatigue ◽  
Fatigue Properties ◽  
Cycle Fatigue ◽  
Nonlinear Elastic

Effect of the Ratio between Tension and Bending Vibration Loads on the Fatigue Behavior and Failure Mode of Titanium Alloy TA11

2014 ◽  
Vol 898 ◽  
pp. 27-32
Author(s):  
Nan Ma ◽  
Xin Ling Liu ◽  
Zhi Wang Qiu ◽  
Yu Huai He ◽  
Chun Hu Tao ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Failure Mode ◽  
Failure Modes ◽  
Fatigue Behavior ◽  
Tensile Force ◽  
Fatigue Properties ◽  
Bending Vibration ◽  
Transversal Vibration ◽  
Axial Tensile ◽  
Vibration Loads

This paper studied the effect of the ratio between the axial tensile force and the transversal vibration loads on the fatigue behavior and failure mode of the near alpha titanium alloy TA11, to simulate the service stress state applied on the engine blades, where a large centrifugal force is superimposed with bending vibration loads. The plate-like specimens were used in the fatigue tests by a special testing device which was designed and fabricated in the present research,where the vibration loads were applied by the electro-magnetic exciters. By experiments under various multi-axial fatigue loading cases with different ratios between the axial tensile force and the transversal vibration loads, the fatigue behavior and failure modes were observed and compared. Then, the energy based fatigue criteria were applied for correlation of the test results. The fatigue properties of titanium alloy TA11 under the specialized loading conditions are characterized and discussed. In addition, the experimental observations on the vibration behavior superimposed with different magnitude of axial tensile force are also helpful for understanding the real working conditions of the engine blades.

S043022 Fretting fatigue properties of titanium alloy with CrN thin film

2011 ◽  
Vol 2011 (0) ◽  
pp. _S043022-1-_S043022-4
Author(s):  
Hiroshi MEISHIN ◽  
Shota TANIMOTO ◽  
Daisuke YONEKURA ◽  
Ri-chi MURAKAMI
Keyword(s):  
Thin Film ◽  
Titanium Alloy ◽  
Fretting Fatigue ◽  
Fatigue Properties

S0401-2-4 Fretting fatigue properties of titanium alloy with hard thin film.

2010 ◽  
Vol 2010.1 (0) ◽  
pp. 315-316
Author(s):  
Shota Tanimoto ◽  
Daisuke Yonekura ◽  
Ri-ichi Murakami
Keyword(s):  
Thin Film ◽  
Titanium Alloy ◽  
Fretting Fatigue ◽  
Fatigue Properties

Fatigue properties of a metastable β-type titanium alloy with reversible phase transformation

2008 ◽  
Vol 4 (2) ◽  
pp. 305-317 ◽  
Author(s):  
S.J. Li ◽  
T.C. Cui ◽  
Y.L. Hao ◽  
R. Yang
Keyword(s):  
Titanium Alloy ◽  
Phase Transformation ◽  
Fatigue Properties ◽  
Reversible Phase

The Influences of Cutting Speed on the Fatigue of Titanium Alloy

2007 ◽  
Vol 10-12 ◽  
pp. 742-746
Author(s):  
Guo Sheng Geng ◽  
Jiu Hua Xu
Keyword(s):  
Titanium Alloy ◽  
Electron Microscope ◽  
High Speed ◽  
Cutting Speed ◽  
Cyclic Stress ◽  
Fatigue Properties ◽  
Stress Strain ◽  
Ta15 Titanium Alloy ◽  
Cutting Speeds ◽  
Scanning Electron

This research is concerned with the influences of cutting speed on the fatigue properties of high speed milled Ti-6.5Al-2Zr-1Mo-1V (TA15) titanium alloy. Four different cutting speeds ranging from 50 to 200m/min were used to mill the specimens for fatigue test, and the fatigue properties of them were studied at two stress levels: 80—800MPa and 90—900MPa. The fatigue lives of the specimens milled under different cutting speeds were compared. The fracture surfaces were analyzed using scanning electron microscope (SEM), and cyclic stress-strain properties of TA15 titanium alloy were investigated with a stress-strain gauge. The results showed that increasing cutting speed can help to improve the fatigue properties of titanium alloy, especially at a relatively low cyclic stress level.

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