Multiphase alloys

Figure 57.5. The hght microscope images of the different multiphase alloys in Table 57.2.

Table 57.2. The Properties of the Multiphase Alloy Powders and the Resulting...

Figure 57.16. The comparison of A1 leachability for the casted single-phase alloy powders, the casted multiphase alloy block and CA53. The CA53 was activated at it with 10 wt.% NaOH and its A1 content was determined by x-ray. The other casted alloys were activated at it with 20 wt.% NaOH and their A1 contents were ascertained by SEM EDX.

The Knoop test is a microhardness test. In microhardness testing the indentation dimensions are comparable to microstructural ones. Thus, this testing method becomes useful for assessing the relative hardnesses of various phases or microconstituents in two phase or multiphase alloys. It can also be used to monitor hardness gradients that may exist in a solid, e.g., in a surface hardened part. The Knoop test employs a skewed diamond indentor shaped so that the long and short diagonals of the indentation are approximately in the ratio 7 1. The Knoop hardness number (KHN) is calculated as the force divided by the projected indentation area. The test uses low loads to provide small indentations required for microhardness studies. Since the indentations are very small their dimensions have to be measured under an optical microscope. This implies that the surface of the material is prepared approximately. For those reasons, microhardness assessments are not as often used industrially as are other hardness tests. However, the use of microhardness testing is undisputed in research and development situations. 

MP35N multiphase alloy, composition of wear- resistant alloy, 7 221t MPD-1 fibers, 13 372, 373 MPDI fibers. See also Polyfira-phenylene isophthalamide) (MPDI) structure of, 19 727 uses for, 19 733-734 m-phenylenediamine (MPD), 19 714 MQ resins, 22 586-588 applications of, 22 588 manufacture of, 22 587-588 molecular structure of, 22 587 viscoelastic properties of, 22 588 MRI agents, dendrimer-based, 26 795-796 Mrigal, common and scientific names, 3 187t... 

N. Kuiiyama, D. Chartouni, M. Tsukahara, K. Takahashi, H.T. Takeshita, H. Tanaka, L. Schlapbach, T. Sakai, I. Uehara, Scanning tunneling microscopy in situ observation of phase-selective cathodic hydrogenation of a V-Ti-Ni-based multiphase alloy electrode, Electrochem. Solid-State Lett. 1 (1998) 37-38. 

Sologub et al. (1995b) reported on the crystallographic data for the NdCdSb2 (1) compound (HfCuSi2-type structure, a = 0.43454, c = 1.0827 X-ray powder diffraction) obtained from a multiphase alloy. For the sample preparation and the purity of the starting materials,... 

Amalgams are typically used in dental applications and are multiphase alloys. Silver-tin amalgam carries a risk of mercury release through corrosion of the... 

Y. Murayama and S. Hanada, High temperature strength, fracture toughness and oxidation resistance of Nb-Si-Al-Ti multiphase alloys , Sci. and Tech, of Adv. Matls., 3 (2002) 145-156... 

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