Texture Development of Mg AZ80 after Cyclic Loading at 80% Yield Stress

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In situ experiments with a 20kN loading device were carried out at the high energy beam line Harwi-II at Hasylab/Desy-Hamburg/Germany. Main goals were firstly to investigate lattice dependant strain development in the elastic as well as in the plastic region and secondly to perform cyclic loading for strain and texture development. Due to the high energy of about 100keV the synchrotron beam has a high penetration power. Moreover, measurements were comparably fast. The test sample was rectangular extruded Mg AZ80. According to the bar extrusion process, the Mg AZ80 sample has the typical texture with two ideal fibre components, <100> parallel RD and <0001> parallel ND, and an ideal texture component {0001}<100>. Tensile samples were cut with loading direction parallel to transfers direction. The sample diameter of round tensile samples was 4mm. Stress strain curves were carried out ex situ to get an overview of the materials behaviour and in situ to get strain dependant lattice values for at least 6 Mg reflections. The cyclic loading was carried out with a maximum load of about 80% of the yield stress so that one stays always in elastic region. Nevertheless, after 3800 cycles a texture change of the quantitative texture was obtained. Existing texture components are stable but the volume fractions of the three texture components change and additionally a new but weak texture component is growing.

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Periodical:

Edited by:

Hajo Dieringa, Norbert Hort and Karl Ulrich Kainer

Pages:

198-201

DOI:

10.4028/www.scientific.net/MSF.690.198

Citation:

H. G. Brokmeier et al., "Texture Development of Mg AZ80 after Cyclic Loading at 80% Yield Stress", Materials Science Forum, Vol. 690, pp. 198-201, 2011

Online since:

June 2011

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$35.00

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