Influence of microarc oxidation and hard anodizing on plain fatigue and fretting fatigue behaviour of Al–Mg–Si alloy

In many assemblies of moving components, contact problems under various lubrication conditions are lifetime-limiting. There, relative motion of contacting bodies, combined with high loads transmitted via the contact surface lead to fretting fatigue failure. For a reliable prediction of in service performance load type, different damage and failure mechanisms that may be activated during operation have to be known. In this contribution selected results of a currently conducted research project are presented. The aim of this study was to examine the material behaviour of a surface stressed steel. The influence of the fretting regime on fatigue properties has been investigated.

Download Full-text

Effect of contact pressure and stress ratio on the fretting fatigue behaviour of Ti-6Al-4V

Materials Science and Engineering A ◽

10.1016/j.msea.2017.09.046 ◽

2017 ◽

Vol 707 ◽

pp. 647-656 ◽

Cited By ~ 3

Author(s):

Virendra Kumar Verma ◽

Hamza Naseem ◽

S. Ganesh Sundara Raman ◽

H. Murthy ◽

Anuradha Nayak Majila ◽

...

Keyword(s):

Contact Pressure ◽

Stress Ratio ◽

Fatigue Behaviour ◽

Fretting Fatigue

Download Full-text

Fretting Fatigue Behaviour of 12-Cr Steels and Strength Prediction

Materials Science Forum ◽

10.4028/www.scientific.net/msf.783-786.920 ◽

2014 ◽

Vol 783-786 ◽

pp. 920-925

Author(s):

Murugesan Jayaprakash ◽

Yoshiharu Mutoh

Keyword(s):

Compressive Stress ◽

Tangential Stress ◽

Contact Pressure ◽

Room Temperature ◽

Fatigue Behaviour ◽

Fretting Fatigue ◽

Strength Prediction ◽

Stress Range ◽

Cr Steels ◽

Contact Pressures

In the present study fretting fatigue behaviour of 12-Cr steels at 300°C has been investigated under three different contact pressures. For comparisons fretting fatigue behaviour of 12-Cr steels at room temperature has also been investigated. The result showed that with an increase in contact pressure and temperature, the fretting fatigue significantly reduces. Finite element analyses were carried out to evaluate the stress distribution (tangential stress and compressive stress) at the contact during fretting fatigue. Tangential stress range – compressive stress range diagram (TSR-CSR diagram) were constructed for 12-Cr steel at room temperature and at 300°C. Then, a generalized TSR-CSR diagram to predict fretting fatigue strength of 12-Cr steel regardless of contact pressure and temperature was constructed.

Download Full-text

A Study on Surface Modification of Al7075-T6 Alloy against Fretting Fatigue Phenomenon

Advances in Materials Science and Engineering ◽

10.1155/2014/474723 ◽

2014 ◽

Vol 2014 ◽

pp. 1-17 ◽

Cited By ~ 11

Author(s):

E. Mohseni ◽

E. Zalnezhad ◽

Ahmed A. D. Sarhan ◽

A. R. Bushroa

Keyword(s):

Surface Modification ◽

Fatigue Life ◽

Physical Vapor Deposition ◽

Ion Beam ◽

Fretting Fatigue ◽

Hard Coatings ◽

Practical Applications ◽

Hard Anodizing ◽

Shock Peening ◽

Fretting Damage

Aircraft engines, fuselage, automobile parts, and energy saving strategies in general have promoted the interest and research in the field of lightweight materials, typically on alloys based on aluminum. Aluminum alloy itself does not have suitable wear resistance; therefore, it is necessary to enhance surface properties for practical applications, particularly when aluminum is in contact with other parts. Fretting fatigue phenomenon occurs when two surfaces are in contact with each other and one or both parts are subjected to cyclic load. Fretting drastically decreases the fatigue life of materials. Therefore, investigating the fretting fatigue life of materials is an important subject. Applying surface modification methods is anticipated to be a supreme solution to gradually decreasing fretting damage. In this paper, the authors would like to review methods employed so far to diminish the effect of fretting on the fatigue life of Al7075-T6 alloy. The methods include deep rolling, shot peening, laser shock peening, and thin film hard coatings. The surface coatings techniques are comprising physical vapor deposition (PVD), hard anodizing, ion-beam-enhanced deposition (IBED), and nitriding.

Download Full-text