With increasing longevity in many countries, the demand for prostheses to replace damaged hard tissue is growing. In recent years, efforts have focused on developing new titanium (Ti) alloys with a lower Young’s modulus, closer that of human bone (30 GPa), given average cost $32,933 prosthesis replacement procedures. While such already exist, metastable β-Ti drawn attention due their excellent combination good strength, biocompatibility, and abundance Earth’s crust. A better understanding...

The aluminum bronze alloy is part of a class highly reliable materials due to high mechanical strength and corrosion resistence being used in the aerospace shipbuilding industry. It's machined produce parts after its use cycle, it's discarded, but third process considered expensive besides not correct for environment reasons. Thus, reusing this material through powder metallurgy (PM) route advantageous. chips were submitted energy ball milling with 3% niobium carbide (NbC) addition. NbC...

The austenitic stainless steel 316L is the most used metallic biomaterials in orthopedics applications, especially manufacture of articulated prostheses and as structural elements fracture fixation, since it has high mechanical strength. However, because biologically inactive, does not form chemical bond with bone tissue, fixed only by morphology. development biocomposites a bioactive material, such hydroxyapatite - HA, presented an alternative to improve response tissue-implant interface....

316L stainless steel and Hydroxyapatite (5, 20 50 wt. (%) HA)-316L composites were fabricated by mechanical alloying technique, pressing sintering from HA powders. The corrosion behavior of both sintered HA-316L was evaluated electrochemical techniques in simulated body fluid (Ringer's solution) 0.1M HCl solution which simulates occluded cell conditions. results indicate that are passive Ringer's active solution. All materials highly resistant with current density the order 10-6 A cm-2 or...

In this study, the high energy mechanical milling was utilized to production of duplex stainless steel powders from recycling chips with and without addition niobium carbide. The effect time carbide on morphology, particle size magnetic properties investigated. utilization powder metallurgy constitute an important alternative for reuse waste in industrial sector. realized using a planetary ball mill 20 hours at speed 350 rpm ball-to-powder weight ratio 15:1were used, (0% 3 wt. %) (NbC)...

The AISI 52100 is a tool-type steel and more often used in industry for the production of bearings. After end its life cycle, it discarded or remelted, but both processes are considered expensive. Thus, possibility reusing this material through powder metallurgy (PM) route advantageous, since transforms waste into another product. To obtain starting powders, scrap was submitted to process high energy ball milling, which milled pure with 1 3 % niobium carbide (NbC) additions. Those additions...

The Vanadis® 8 is a tool steel used in the manufacture of dies, punches and tools. It has high carbon content combined with chromium, molybdenum vanadium, presents good performance its mechanical properties. Usually, chips obtained by machining are sold to companies that use remelting. However, this technique considered expensive harmful environment. Therefore, work aimed analyze efficiency addition vanadium carbide (VC) (Mo2C) energy ball milling steel. Microstructural analysis were...

The AISI 52100 is a tool steel used in industry to produce bearings. After the end of its life cycle, it remelted or discarded deposits. powder metallurgy rises as an alternative recycle this material without any waste. steps by included: Machining with speed 45 rpm, high energy ball milling scraps during 30 hours mass/sphere relation 1:15 and 400 uniaxial pressing using 175 MPa sintering through minutes at 1200ºC. Also, were incorporated 1%, 3% 5% alumina particles process increase...

The growth of the elderly population is urging for more suitable biomaterials to allow performance better surgical and implant procedures accelerate patient’s healing because are vulnerable orthopedic dental problems. β-phase Ti alloys can improve mechanical properties implants by reducing their elastic modulus and, consequently, effects stress shielding within bones. Therefore, objective this article study a novel ternary alloy Ti10Mo8Nb produced an electric arc furnace rotary forge....

Due to the increased consumption of raw materials, energy, and waste it generates, recycling has become very important fundamental for environment industrial sector. The production duplex stainless–steel powders with addition vanadium carbide in high energy mechanical milling process is a new method materials manufacture components This study aims reuse chips from UNS S31803 by powder metallurgy Vanadium (VC). was performed using planetary ball mill 50 h at speed 350 rpm ball-to-powder...

The aim of this study was to provide an experimental investigation on the novel method for recycling chips duplex stainless steel, with addition vanadium carbide, in order produce metal/carbide composites from a high-energy mechanical milling process. Powders steel carbide were prepared by ball utilizing planetary mill. For proposal, experiments following full factorial design two replicates planned, performed, and then analyzed. four factors investigated rotation speed, time, powder weight...

The aim of this work is to prepare the Ni3Ti, NiTi, and NiTi2 compounds by mechanical alloying from elemental Ni-25at.%Ti, Ni-50at.%Ti, Ni-66.6at.%Ti powder mixtures. milling process was carried out in a planetary ball mill under argon atmosphere using rotary speed 200rpm, stainless steel balls (10 19 mm diameters) vials (225mL), ball-to-powder weight ratio 10:1. Following, milled powders were heat treated at 900oC for 1h order attain equilibrium microstructures. characterized means X-ray...

Stainless steel components produced by powder metallurgy constitute an important and growing segment of the industry. The high energy ball milling process can be alternative for recycling stainless chips. A major advantage is its ability to recyclable. reuse recyclable materials has as main objectives minimize environmental impacts rationalize use chains. This work aims at production steel, starting from machining chips pure, with addition vanadium carbides planetary weight ratio 20:1, mill...

Nos últimos anos, diversas pesquisas têm sido realizadas buscando o desenvolvimento de materiais para aplicações biomédicas. E, um dos objetivos desses estudos, é otimizar comportamento da interface material/meio biológico. Dentre os mais utilizados, estão titânio e suas ligas devido às propriedades como resistência à corrosão biocompatibilidade. Estudos constataram que celular pode ser influenciado por alterações na morfologia das superfícies. Dessa maneira, objetivo deste estudo foi...

This study aims to analyze the efficiency of niobium and vanadium carbides in high energy mechanical milling aluminum bronze alloy.Two series experiments were made following same steps for both carbide (NbC) (VC) additions: 30 g chips weighed placed a stainless steel jar with 3 % 1 stearic acid mass/sphere relationship 1:10.The was realized using planetary ball mill 10, 50 hours an inert argon atmosphere at 300 rpm.Results shown laser diffraction indicate great reduction particle sizes...

Aluminum bronze alloy is applied in environments that require materials of high mechanical resistance and wear, such as marine, oil & gas aerospace ones. This study analyzes the densification composites based on aluminum with additions vanadium (VC) niobium (NbC) carbides, influence these carbides milling efficiency improvement diffusion process between particles to obtain better results for density porosity. The were produced by powder metallurgy from powders obtained discarded scraps....

Mixtures of AA2124 aluminum alloy powder and SiC particles at volume fractions 10 vol.% 20 were milled in a high energy planetary ball mill under an argon atmosphere, for times 2.5h to 60 h, aiming produce Al alloy-SiC nanocomposites. Optical microscopy (MO) scanning electron (SEM) used evaluate the morphological microstructural evolution composite, occurred during mechanical alloying. The crystallite size was determined using Williamson-Hall method analyze X-ray peak broadening. It observed...