Year: 1959
Type: report
Abstract: A study has been made of the deformation processes active in zirco nium crystals deformed at 77°K, 300°K, 575°K, and 1075 K.The specimens were large-grained samples of relatively high purity and wide orientation distribution.The only slip system observed at any of the temperatures was of the form (1010) [1210] with a critical resolved shear stress of about 1.0 kg/mm in tension at 77°K, 0.65 kg/mm^ in compression at 300 K, 0,20 kg/mm in tension at 575°K, and 0,02 kg/mm^ in tension at 1075OK.The slip planes were found by the usual two-trace techniques and the slip direction found from a detailed analysis of Laue spot asterism which is appended.The active twin planes were {1012^, -^1121^ -£ll22j and £11233' with varying frequencies at the different test temperatures.The most active at all temperatures was {11213, with {1122J, {1123} and £10123-twins unob served at 1075°K.The absolute thicknesses of the twin families at each temperature were measured and compared with the twinning shears for the contributing families to yield deviations from the generalization that the twinning shear is inversely related to the twin breadth.
DOI: 10.2172/4213416
Institution: Starmet Corporation (United States)
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
OpenAlex ID: W197797009