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molybdenum/умор
Веза се чува у привремену меморију
Страна 1 од 19 резултати
Effects of Molybdenum Addition on Rolling Contact Fatigue of Locomotive Wheels under Rolling-Sliding Condition
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Rolling contact fatigue (RCF) damages often occur, sometimes even leading to shelling on locomotive wheel treads. In this work, the RCF damage behaviors of two locomotive wheel materials with different molybdenum (Mo) contents were studied, and the influence of depth of wheel material was explored
Fatigue fracture of a forged cobalt-chromium-molybdenum femoral component inserted with cement. A report of ten cases.
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Ten patients who had had a total hip replacement with a forged cobalt-chromium-molybdenum femoral prosthesis (Precoat or Precoat Plus) inserted with cement were seen with a fatigue fracture of the stem an average of fifty months (range, nineteen to seventy-four months) postoperatively. The average
The role of molybdenum in suppressing cold dwell fatigue in titanium alloys.
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We test a hypothesis to explain why Ti-6242 is susceptible to cold dwell fatigue (CDF), whereas Ti-6246 is not. The hypothesis is that, in Ti-6246, substitutional Mo-atoms in α-Ti grains trap vacancies, thereby limiting creep relaxation. In Ti-6242, this creep relaxation enhances the loading of
A study of corrosion fatigue in cast cobalt-chrome-molybdenum alloys.
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Metallurgical analysis of five failed cast cobalt-chromium-molybdenum alloy hip prostheses.
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The clinical and metallurigical characteristics of five cast cobalt-chromium-molybdenum alloy femoral hip prostheses which failed in vivo were evaluated. The devices included: two of the Howmedica Muller-Charnley design, two of the Howmedica Charnley design, and one of the Zimmer Aufranc-Turner
Nanocrystalline material with gigacycle fatigue life.
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A processing technology has been developed that can be applied to many different fine wire medical alloys to improve their fatigue properties. This technology has been used to process a low inclusion alloy, 35 cobalt-35 nitinol-20 chromium-10 Molybdenum (ASTM F562 chemistry), hereinafter referred to
Predicting multipulse laser-induced failure for molybdenum metal mirrors.
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In combination with known thermomechanical-fatigue data for Mo, we have conducted transient photothermal deflection (TPD) measurements to develop a model for the multipulse laser damage of Mo mirrors to predict their lifetimes. In laser-damage experiments to verify the model, Mo mirrors were
Computer and experimental analyses of the stress state in the cement hip joint endoprosthesis body.
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OBJECTIVE
One of the possible complications after implantation of a cement hip-joint endoprosthesis is frac- ture in the endoprosthesis body. Fractures arise from overload or material fatigue of which an implant is made. The purpose of this research was to define the intensity of maximum stress and
[Knee endoprosthesis: selection and requirements of materials].
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The possibilities of using different material combinations for the replacement of knee joint endoprostheses are very limited. Therefore, cobalt-chromium-molybdenum alloys are currently being used for femoral components and ultra-high molecular weight polyethylene for tribologically stressed tibial
Potential for adhesive wear in friction couples of UHMWPE running against oxidized zirconium, titanium nitride coatings, and cobalt-chromium alloys.
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The classical wear mechanisms abrasion, fatigue, and adhesion are the most frequent causes of surface changes of ultra high molecular weight polyethylene (UHMWPE) in artificial joints. The counterpart material has a strong influence on the wear and friction behavior of artificial joints due to its
Cast vs. wrought cobalt-chromium surgical implant alloys.
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The measured tensile and fatigue strengths of wrought and heat-treated cobalt chromium-molybdenum-carbon alloys such as HS21 were found to be more than twice those of as cast alloys of the same composition. The resistance of wrought HS21 to crevice corrosion at metal-Teflon contacts in isotonic salt
Assessment of wrought ASTM F1058 cobalt alloy properties for permanent surgical implants.
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The behavior of the ASTM F1058 wrought cobalt-chromium-nickel-molybdenum-iron alloy (commonly referred to as Elgiloy or Phynox) is evaluated in terms of mechanical properties, magnetic resonance imaging, corrosion resistance, and biocompatibility. The data found in the literature, the experimental
Fracture of dental implants: literature review and report of a case.
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Fracture of dental implants is a rare phenomenon with severe clinical results. In this article, the literature is reviewed and various causative factors that may lead to fracture are presented. Galvanic activity has not been mentioned before as a possible cause for implant fracture, yet, it can
[Instruments necessary for safe laser microsurgery].
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Special instruments have been perfected for the laser microsurgery. Those instruments must not exceed 18 centimeters in length in order to reduce the possibility of infection through the middle part (microslad) tied up to the microscope. The instruments must be blackened to reduce the casual
Extraction and characterization of metallic wear debris from total joint arthroplasty.
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Wear debris generated from total joint arthroplasty may elicit a granulomatous and inflammatory response and has also been implicated in the development of osteolysis. Technical difficulty in retrieval and isolation of wear material from tissues has hindered the study of their physicochemical
Најкомплетнија база лековитог биља подржана науком
- Ради на 55 језика
- Биљни лекови потпомогнути науком
- Препознавање биљака по слици
- Интерактивна ГПС мапа - означите биље на локацији (ускоро)
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