Anelastic relaxation in high purity molybdenum single crystals at medium temperatures

LAMBRI, OSVALDO; ZELADA-LAMBRI, GRISELDA; SALVATIERRA, LUCAS; GARCÍA, JOSÉ ÁNGEL; LOMER, JENIFER

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

Elsevier B. V.

Lugar: Amsterdam, NH; Año: 2004 vol. 370 p. 222 - 224

0921-5093

The internal friction of deformed molybdenum single crystals with two different orientations has been measured in the 300–1300 K temperature range. After annealing to 950 K, a relaxation peak is seen in the 880–840 K range, with a hysteresis between the warming and cooling runs. For higher annealing temperatures, the peak position change to 970 K for the (1 1 0) and 1040 K for the (1 4 9) sample. The influence of a bias stress on the sample relaxation was studied. Possible mechanisms for this relaxation have been considered, and an interaction of dislocations with vacancy type point defects has been proposed.