... and exposure to aggressive body environments have led to severe corrosion-based degradation of titanium, cobalt-chromium, and stainless steel alloys. This chapter provides a summary of the basic mechanisms of mechanically assisted corrosion, the role of crevice solution chemistry and the surface materials...

... As a reactive and active-passive metal, titanium's exceptional corrosion resistance and passivity in a vast range of environments stems from the formation and maintenance of of a highly stable and protective titanium oxide surface film. Understanding both the environmental and metallurgical...

.... additive manufacturing medical device orthopedic implant total ankle ankle titanium Ti-6Al-4V cobalt chrome STRUCTURAL INTEGRITY OF ADDITIVE MANUFACTURED PARTS 437 STP 1620, 2020 / available online at www.astm.org / doi: 10.1520/STP162020180096 Dirk Scholvin,1 Doug Linton,1 David Tuttle,1 Ben...

... The flammability in oxygen-enriched atmospheres of commercially pure (CP) titanium rods as a function of diameter and test gas pressure was determined. Test samples of varying diameters were ignited at the bottom and burned upward in 70 % O 2 /balance N 2 and in 99.5+ % O 2 at various...

... The scope of this paper is to determine the fatigue-crack growth rates in the near-threshold regime for both an aluminum and titanium alloy using the compression precracking constant-amplitude (CPCA) test method on compact specimens. Tests were conducted over a wide range of stress ratios ( R...

... and titanium foil represented the contaminant particles. In both the Monel® and Inconel® material configurations, the aluminum foil tape samples did not ignite after 30 s of rubbing. In contrast, all of the titanium foil samples ignited regardless of the rubbing duration or material configuration. However...

... Titanium-15Molybdenum beta titanium alloy is a generic alloy that has been around for a long time, but has never found wide use in the aerospace industry. Beta titanium alloys, in general, and corrosion-resistant biocompatible titanium alloys, in particular, attracted a lot of attention...

... A recent addition to existing titanium alloys is the Super-TIX ™ series (Nippon Steel Corp., Japan), which has intermediate strength between the strengths of CP Ti and Ti-6A1-4V as a result of balancing the Fe, O, and N concentrations. Two alloys in this series were investigated: Ti-l%Fe-0.35%O...

... Commercially pure titanium (cpTi), Ti-6AI-4V (Ti64), and Ti-15Mo-2.8Nb-0.2Si (21SRx), with three unique atomic, alpha, alpha-beta, and beta grain structures, respectively, were subjected to three different surface treatments: cleaning, nitric acid passivation, and heat treatment. Experiments...

... The purpose of this study was to evaluate and compare the corrosion fatigue (CF) characteristics of a series of titanium alloys including Grade 4 CP Ti (ASTM F 67), Ti-6A1-4V (ASTM F 136), Ti-6Al-7Nb (ASTM F 1295), and Ti-15 Mo (ASTM F 2066). Evaluation of alloy composition, microstructure...

... the conditions evaluated. stress corrosion cracking titanium notched Journal of ASTM International, October 2005, Vol. 2, No. 9 Paper ID JAI12785 Available online at www.astm.org R. Scott Williamson,1 Michael D. Roach,1 and Lyle D. Zardiackas1 Comparison of Stress Corrosion Cracking Characteristics...

... Severe, localized corrosion of titanium-alloy femoral stems has been reported for specific designs of hip prostheses intended for fixation using acrylic cement. The purpose of the present study was to examine the possibility that corrosion might also occur when titanium-alloy stems are inserted...

... It is well established that particulate debris can cause osteolysis. The current paper describes a simple procedure to generate titanium and stainless steel particulates for in vitro and in vivo use. The ‘wear generator’ consisted of three pins out of titanium or stainless steel fixed onto...

... fusion construct crevice corrosion stainless steel titanium John S. Kirkpatrick, 1Ramakrishna Venugolopalan, 2Monique Bibbs, 3 Jack E. Lemons, 4 Preston Beck5 Corrosion on Spinal Implant Constructs: Should Standards Be Revised? Reference: Kirkpatrick, J.S., Venugolopalan, R., Bibbs, M., Lemons, J...

... Three types of hip stems, MS-30 ™ high-nitrogen stainless steel, Natural Hip ™ cobalt-chromium, and APR ® II porous titanium were interfaced with cobalt-chromium femoral heads. They were tested according to ASTM F 1875-98. In the initial 1 Hz cyclic loading up to 480 cycles, the average...

... hardening steels satisfying the requirements of some of the leading bearing manufacturers. The present paper discusses the manufacturing process for bearing steel through Basic Oxygen Furnace-Vacuum Arc Degassing route. This paper also brings out the strategy to control oxygen and titanium. Test results...

... Chemical vapor deposition was employed to grow nano-structured carbon films on a titanium alloy (Ti-6Al-4V) using different N 2 /CH 4 feedgas ratios in a balance of H 2 . Of particular interest is a determination of how the film hardness changes with N 2 /CH 4 feedgas ratio and how...

... and results of void structure analysis by TEM. All methods yield the same order of magnitude for the stress-induced linear swelling. neutron irradiation swelling stress-induced swelling austenitic alloy DIN 1.4970 silicon titanium pressurized tube experiment microstructure Ralph HObner1and...

... A series of Fe-Cr-35Ni alloys was irradiated to doses ranging from 12 to 36 dpa with fast neutrons at 375–600°C and to 59–117 dpa at 675°C with Ni + ions. The primary purpose of this study was to examine the effect of silicon and titanium on both microstructural evolution and the tendency of Fe...

... is minor. fatigue crack propagation crack closure residual stresses titanium load interaction life prediction Markus Lang 1 and James M. Larsen 2 Fatigue Crack Propagation and Load Interaction Effects in a Titanium Alloy REFERENCE: Lang, M. and Larsen, J. M., "Fatigue Crack Propagation...