Effect of Shot Peening on the High-Cycle Fatigue Behavior of High-Strength Cast Iron with Nodular Graphite

2017 ◽  
Vol 58 (9-10) ◽  
pp. 568-571 ◽  
Author(s):  
Amir Sadighzadeh Benam
Keyword(s):  
Cast Iron ◽  
Shot Peening ◽  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
High Strength ◽  
Cycle Fatigue ◽  
Nodular Graphite

High Cycle Fatigue Behavior of Recycled Additive Manufactured Electron Beam Melted Titanium Ti6Al4V

2020 ◽  
Author(s):  
Melody Mojib ◽  
Rishi Pahuja ◽  
M. Ramulu ◽  
Dwayne Arola
Keyword(s):  
Electron Beam ◽  
Fatigue Life ◽  
Rough Surface ◽  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
High Strength ◽  
Fatigue Tests ◽  
Cycle Fatigue ◽  
Initiation And Propagation ◽  
Powder Recycling

Abstract Metal Additive Manufacturing (AM) has become a popular method for producing complex and unique geometries, especially gaining traction in the aerospace and medical industries. With the increase in adoption of AM and the high cost of powder, it is critical to understand the effects of powder recycling on part performance to move towards material qualification and certification of affordable printed components. Due to the limitations of the Electron Beam Melting (EBM) process, current as-printed components are susceptible to failure at limits far below wrought metals and further understanding of the material properties and fatigue life is required. In this study, a high strength Titanium alloy, Ti-6Al-4V, is recycled over time and used to print fatigue specimens using the EBM process. Uniaxial High Cycle Fatigue tests have been performed on as-printed and polished cylindrical specimens and the locations of crack initiation and propagation have been determined through the use of a scanning electron microscope. This investigation has shown that the rough surface exterior is far more detrimental to performance life than the powder degradation occurring due to powder reuse. In addition, the effects of the rough surface exterior as a stress concentration is evaluated using the Arola-Ramulu. The following is a preliminary study of the effects powder recycling and surface treatments on EBM Ti-6Al4V fatigue life.

High cycle fatigue behavior of hard turned 300 M ultra-high strength steel

2020 ◽  
Vol 131 ◽  
pp. 105380 ◽  
Author(s):  
J. Ajaja ◽  
W. Jomaa ◽  
P. Bocher ◽  
R.R. Chromik ◽  
M. Brochu
Keyword(s):  
High Strength Steel ◽  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
High Strength ◽  
Cycle Fatigue ◽  
Ultra High Strength Steel

Influence of microstructure on high-cycle fatigue behavior of austempered ductile cast iron

1993 ◽  
Vol 30 (4) ◽  
pp. 221-234 ◽  
Author(s):  
Leslie Bartosiewicz ◽  
A.R. Krause ◽  
F.A. Alberts ◽  
Iqbal Singh ◽  
Susil K. Putatunda
Keyword(s):  
Cast Iron ◽  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
Ductile Cast Iron ◽  
Cycle Fatigue ◽  
Austempered Ductile Cast Iron

Influence of Severe Shot Peening on the Surface State and Ultra-High-Cycle Fatigue Behavior of an AW 7075 Aluminum Alloy

2017 ◽  
Vol 26 (6) ◽  
pp. 2784-2797 ◽  
Author(s):  
Libor Trško ◽  
Mario Guagliano ◽  
Otakar Bokůvka ◽  
František Nový ◽  
Michal Jambor ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Surface State ◽  
Shot Peening ◽  
High Cycle Fatigue ◽  
Fatigue Behavior ◽  
7075 Aluminum Alloy ◽  
Cycle Fatigue ◽  
Ultra High Cycle Fatigue ◽  
Severe Shot Peening

Very High Cycle Fatigue Behavior and Thermographic Analysis of High Strength Steel

2010 ◽  
Vol 118-120 ◽  
pp. 948-951
Author(s):  
Chuang Shao ◽  
Claude Bathias ◽  
Danièle Wagner ◽  
Hua Tao
Keyword(s):  
Crack Initiation ◽  
High Strength Steel ◽  
High Cycle Fatigue ◽  
Fatigue Testing ◽  
Fatigue Behavior ◽  
High Strength ◽  
Cycle Fatigue ◽  
Subsurface Crack ◽  
Very High Cycle Fatigue ◽  
Very High

Very high cycle fatigue behavior of high strength steel, were investigated using ultrasonic fatigue testing equipment at 20 kHz up to 109cycles. S-N curves at room temperature with different stress ratio (R=0.01 and R=0.1) was determined. The experimental results show that fatigue strength decrease with increasing number of cycles between 105 and 109. SEM examination of fracture surface reveals that fatigue damage was governed by the formation of cracks, and subsurface crack initiation was in the very long life range. The results shown that the portions of life attributed to subsurface crack initiation between 107 and 109 cycles are 99%.

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