Mechanisms of linear anelasticity in Fe-M and Fe-Al-M (M = Ga, Ge) alloys

作者：Golovin I S^*

来源：Physics of Metals and Metallography, 2013, 114(12): 1018-1030.

DOI：10.1134/S0031918X13090056

• iron alloys
• Fe-Ga
• Fe-Ge
• Fe-Al-Ga
• Fe-Al-Ge
• internal friction
• ordering

Linear anelastic effects in binary and ternary alloys of iron with 13 and 17 at % Ga, 12 at % Ge, and 4-8 at % Al (Fe-13Ga, Fe-17Ga, Fe-12Ge, Fe-8Al-3Ga, Fe-8Al-4Ge, and Fe-4Al-8Ge) have been investigated. In all of these alloys, thermally activated effects of linear anelasticity have been found and identified that are caused by point defects in interstitial (Snoek-type relaxation) and substitutional (Zener relaxation) solid solutions, as well as by dislocations (Hasiguti effect), and by grain boundaries. The effects of the alloy composition on the activation parameters of the above-mentioned relaxation mechanisms have been determined. In addition, frequency-independent effects related to processes of structural rearrangement, such as ordering and disordering of the alloys have been revealed due to the specific features in the curves of the temperature dependences of internal friction for almost all compositions.

• 出版日期2013-12