Metal Science and Heat Treatment

Bronfin, B.; Moscovitch, N.

doi: 10.1007/s11041-006-0121-zpmid: N/A

Metallurgical aspects of the development of new magnesium alloys for the production of transmission parts and assemblies with the use of sand mold casting, chill casting, and high-pressure die casting are considered. The approach suggested has been used for creating new alloys with elevated creep resistance. The properties of the alloys are presented and compared with the properties of known commercial magnesium alloys.

Rokhlin, L.

doi: 10.1007/s11041-006-0122-ypmid: N/A

The structure and properties of magnesium alloys alloyed with rare-earth metals (REM) are considered. The alloys are compared to commercial magnesium alloys. Perspectives of magnesium alloys with earlier unused REM are discussed.

Kaibyshev, R.; Galiev, A.

doi: 10.1007/s11041-006-0123-xpmid: N/A

Superplasticity of magnesium alloy ZK60A with an ultrafine-grain structure is investigated. It is shown that parts can be produced from this alloy by the method of superplastic gas forming.

Zinov’ev, A.; Ionov, A.; Kaputkina, L.; Mironov, P.; Kaputkin, E.; Sigalov, Yu.; Solomonik, Ya.

doi: 10.1007/s11041-006-0124-9pmid: N/A

Magnesium alloy AZ31 is studied after testing in a temperature range of 350–450°C in two modes of loading, i.e., compression at a rate of 0.1–10 sec−1 and hot rolling with deformation of degree 20–50% at a rate of 0.214 m/sec. The effect of the deformation parameters on the grain size and on the hardness of the alloy is determined.

Swiostek, J.; Letzing, D.; Kainer, K.

doi: 10.1007/s11041-006-0125-8pmid: N/A

The microstructure and mechanical properties of magnesium alloys are studied after extrusion. Shapes are obtained from commercial magnesium alloys with the help of a rarely used technology, i.e., hydrostatic extrusion at 100°C (a temperature much lower than the one at which new slip planes are activated). All the tests are performed with allowance for typical parameters, such as the rate of extrusion and the degree of drawing, in order to choose appropriate conditions for fabricating a material with exceptionally fine grains, which is typical for a structure formed as a result of equal-channel angular extrusion (ECAE). The constraints connected with this kind of treatment are discussed as well as the effects of its parameters on the microstructure and mechanical properties of the extruded shapes.

Estrin, Y.; Hellmig, R.

doi: 10.1007/s11041-006-0126-7pmid: N/A

Some aspects of grain refinement in the process of equal channel angular pressing (ECAP) are considered. Characteristics of strength, fatigue, and superplasticity of magnesium alloys AZ31, ZK60, and AS21X are studied. The possibilities of increasing the rate of hydrogen absorption by alloy ZK60 after ECAP treatment are discussed.

Volkova, E.

doi: 10.1007/s11041-006-0127-6pmid: N/A

The effect of the process factors of casting and subsequent complex treatment including the process of hydroextrusion and heat treatment on the structure and mechanical properties of magnesium alloys MA14 and MA14gr of the Mg-Zn-Zr system is studied.

Rusin, N.

doi: 10.1007/s11041-006-0128-5pmid: N/A

The composition and structure of magnesium alloy AM60 with additional 0.3 wt.% TiC are considered after casting into a steel mold. Changes in the composition and in structure in the process of high-temperature annealing (at 420° C) are determined.

Kaya, A.; Ben-Hamu, G.; Eliezer, D.; Shin, K.; Kohen, S.

doi: 10.1007/s11041-006-0129-4pmid: N/A

The corrosion resistance of an alloy of the Mg-Y-Zr-REM system obtained by sand casting and subjected to different modes of heat treatment is studied with the use of potentiodynamic polarization, immersion tests, scanning electron microscope, and Auger electron spectroscope. The microstructure of the alloy is described.