Made available in DSpace on 2022-04-28T19:05:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-01-01; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Ti 6Al-4V is known as the workhorse of the titanium industry, and this alloy accounts for more than 50% of total titanium usage. It is an alpha+beta alloy that is recommended for use at service temperatures up to approximately 350°C. ...
Made available in DSpace on 2022-04-28T18:59:21Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-12-01; Hastelloy C alloys are widely used in chemical, aerospace and nuclear industries in corrosive environments. The predominant alloying element of these alloys is typically nickel, although other elements are added. Plasma nitriding is an efficient surface treatment to increase wear resistance. The objecti...
Made available in DSpace on 2022-04-29T07:26:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-01-01; The expanded austenite γ<inf>N</inf> can be produced in austenitic stainless steels by plasma nitriding, carburizing or nitrocarburizing at low temperatures. This metastable phase presents higher hardness and toughness if compared with traditional nitride layers whilst also maintaining the corrosion res...
Made available in DSpace on 2020-12-11T19:25:49Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-06-01; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); In this work, alternating current (AC) voltage (V-AC) is applied to Ti-6Al-4V alloy in aqueous oxalic acid dihydrate solution to grow passive oxide films. The oxide layers are formed with V-AC values in the range of 10-80 V. The result...
Made available in DSpace on 2020-12-11T20:53:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-09-15; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Nb, V and Nb-V carbide layers were produced by means of the diffusion thermo-reactive treatment (TRD) in a vermicular cast iron, in baths composed of sodium borate, ...