Fatigue Strength Properties of SCM420 and DSG2 Hybrid Surface Modification Material by Fine Particle Bombarding

2003 ◽  
Vol 2003.52 (0) ◽  
pp. 269-270
Author(s):  
Junji MATSUSHITA ◽  
Noboru EGAMI ◽  
Hirohisa KIMACHI ◽  
Chuji KAGAYA
Keyword(s):  
Surface Modification ◽  
Fatigue Strength ◽  
Fine Particle ◽  
Strength Properties

307 Effect of Hybrid Surface Modification Composed of Plasma-Nitriding and Fine-Particle-Bombarding on Fatigue Strength of Ti-6Al-4V

2007 ◽  
Vol 2007.82 (0) ◽  
pp. _3-7_
Author(s):  
Noriaki UEHIGASHI ◽  
Tatsuro MORITA ◽  
Chuji KAGAYA ◽  
Shinichi TANAKA ◽  
Noriyoshi TSUJI
Keyword(s):  
Surface Modification ◽  
Fatigue Strength ◽  
Fine Particle ◽  
Plasma Nitriding

The Effect of Hybrid Surface Modification; Combination of Fine Particle Bombardment Treatment and Nitriding, on Fatigue Properties of Steel

2007 ◽  
Vol 353-358 ◽  
pp. 215-218
Author(s):  
Shoichi Kikuchi ◽  
Jun Komotori ◽  
Yutaka Kameyama ◽  
Kengo Fukazawa
Keyword(s):  
Residual Stress ◽  
Surface Modification ◽  
Fatigue Strength ◽  
Particle Bombardment ◽  
Fine Particle ◽  
Compressive Residual Stress ◽  
Fatigue Tests ◽  
Fatigue Properties ◽  
Stress Distributions ◽  
Factor Α

In order to clarify the effects of the hybrid surface modification process; a combination of Fine Particle Bombardment (FPB) treatment and nitriding, on the fatigue properties of AISI 4135 steel (stress concentration factor: α=2.36), high cycle fatigue tests were carried out with a rotational bending machine at room temperature. Observations of fracture surfaces and measurements of hardness and residual stress distributions were carried out to investigate the fracture mechanism and fatigue strength. It was revealed that treating process sequence did affect residual stress distributions. Compressive residual stress generated at the surface of FPB treated specimen after nitriding was higher than that of the one FPB treated before nitriding. It was clarified that the higher the specimen hardness was, the higher compressive residual stress was generated at the surface. Therefore, FPB treatment after nitriding increased the fatigue strength of steel.

scholarly journals 327 Tensile and fatigue strength properties in SiC/SiC composites

2006 ◽  
Vol 2006 (0) ◽  
pp. 171-172
Author(s):  
Junji OHGI ◽  
Toshitaka KURAMOTO ◽  
Shinya TANAKA ◽  
Michiyuki SUZUKI ◽  
Koichi GODA
Keyword(s):  
Fatigue Strength ◽  
Strength Properties ◽  
Sic Composites

Evaluation of Total Ankle Arthroplasty Using Highly Crosslinked Ultrahigh-Molecular-Weight Polyethylene Subjected to Physiological Loading

2019 ◽  
Vol 40 (8) ◽  
pp. 880-887 ◽  
Author(s):  
Jeffrey E. Bischoff ◽  
Mehul A. Dharia ◽  
Justin S. Hertzler ◽  
Oliver N. Schipper
Keyword(s):  
Fatigue Strength ◽  
Fatigue Testing ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
Fatigue Loading ◽  
Strength Properties ◽  
Total Ankle Arthroplasty ◽  
Wear Properties ◽  
Ankle Arthroplasty ◽  
Walking Gait

Background: Highly crosslinked polyethylene (HXLPE) was developed for its superior wear properties in comparison to conventional polyethylene (CPE). Concern over fatigue resistance has prevented widespread adoption of HXLPE for use in total ankle arthroplasty (TAA). The aim of this study was to determine whether HXLPE has sufficient fatigue strength for total ankle arthroplasty under simulated physiologically relevant motion profiles and loading in the ankle. Methods: Physiologic load and motion profiles representative of walking gait were incorporated into a computational model of a semiconstrained, fixed-bearing TAA to determine the loading state with highest stresses in the HXLPE bearing. Subsequent fatigue testing to 10 million cycles (Mc) at 5600 N was performed to assess bearing strength. Results: Peak stresses in the bearing were predicted at peak axial load and peak dorsiflexion during gait, occurring near heel off. All samples withstood 10 Mc of fatigue loading at that orientation without polyethylene bearing fracture. Conclusion: HXLPE had sufficient fatigue strength to withstand 10 Mc of loading at more than 5 times body weight at the point of peak stresses during simulated gait in total ankle arthroplasty. Clinical Relevance: HXLPE may be mechanically strong enough to withstand the in vivo demands of the ankle. Improvements in wear afforded by HXLPE can be obtained without compromising sufficient polyethylene strength properties in total ankle arthroplasty.

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