SURFACE HARDENING OF POWDERED IRON-CARBON ALLOYS

Precipitation Hardening of Metal Alloys

Precipitation hardening, or age hardening, provides one of the most widely used mechanisms for the strengthening of metal alloys. The fundamental understanding and basis for this technique was established in early work at the U. S. Bureau of Standards on an alloy known as Duralumin [1,2]. Duralumin is an aluminum alloy containing copper and magnesium with small amounts of iron and silicon. In a...

Precipitation Hardening of Al–Si–Mg Alloys

Precipitation hardening in dilute Al–Zr alloys

The aim of this study was to investigate the effect of solute content (hipoperitectic Al–0.22 wt.%Zr and hiperperitectic Al–0.32 wt.%Zr) on the precipitation hardening and microstructural evolution of dilute Al–Zr alloys isothermally aged. The materials were conventionally cast in a muffle furnace, solidified in a water-cooled Cu mold and subsequently heat-treated at the temperature of 650 K (3...

Comparison of natural organic matter adsorption capacities of super-powdered activated carbon and powdered activated Carbon.

We examined the natural organic matter (NOM) adsorption characteristics of super-powdered activated carbon (S-PAC) produced by pulverizing commercially available, normal PAC to a submicron particle size range. The adsorption capacities of S-PAC for NOM and polystyrene sulfonates (PSS) with molecular weights (MWs) of 1.1, 1.8, and 4.6 kDa, which we used as model compounds, were considerably high...

The Strain Hardening Behaviour of Supersaturated Al-Cu Alloys

Julien da Costa Teixeira, Yves Bréchet , Yuri Estrin and Christopher Hutchinson ARC Centre of Excellence for Design in Light Metals, Department of Materials Engineering, Monash University, Clayton, VIC, 3800, Australia Institut Jean Lamour, Dépt SI2M, Ecole des Mines, Parc de Saurupt, 54042 Nancy, France SIMAP, Institut Nationale Polytechnique de Grenoble, St. Matin D’Hères, 38000, France CSIRO...