Influence of Solution Heat Treatment on the Microstructure, Hardness and Stress Corrosion Behavior of Extruded Resoloy®
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In: JOM: Journal of The Minerals, Metals & Materials Society, Vol. 72, No. 5, 01.05.2020, p. 1870-1879.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Influence of Solution Heat Treatment on the Microstructure, Hardness and Stress Corrosion Behavior of Extruded Resoloy®
AU - Maier, P.
AU - Steinacker, Annkathrin
AU - Clausius, B.
AU - Hort, N.
N1 - Open Access funding provided by Projekt DEAL. The authors acknowledge support from Hartmut Habeck for the corrosion measurements and Jens Wicke for the metallographic preparations.
PY - 2020/5/1
Y1 - 2020/5/1
N2 - The microstructural changes and corrosion response of Resoloy®, a resorbable Mg-Dy-based alloy, are the focus of this study. Hardness, tensile and compressive, and bending tests are used to monitor the changes in the mechanical properties of this material. The corrosion behavior is investigated by stress corrosion of C-rings. Hot-extruded tubes are solution heat-treated at different temperatures and times. The as-extruded condition shows a homogeneous fine-grained microstructure with matrix long-period stacking-ordered (LPSO) structures. Heat treatment at low temperatures and for short times does not significantly change the microstructure but reduces the hardness. Solution heat treatment at relatively high annealing temperatures and long annealing times causes grain growth, resulting in reduced hardness. The microstructure becomes inhomogeneous, medium-sized grains grow, the matrix LPSO structures dissolve, and small bulk LPSO phases develop. The matrix LPSO structures have a positive effect on the corrosion behavior. In particular, the short-term annealing condition shows the most uniform corrosion morphology. Resoloy® is not free of pitting corrosion, but none of the samples fails by cracking.
AB - The microstructural changes and corrosion response of Resoloy®, a resorbable Mg-Dy-based alloy, are the focus of this study. Hardness, tensile and compressive, and bending tests are used to monitor the changes in the mechanical properties of this material. The corrosion behavior is investigated by stress corrosion of C-rings. Hot-extruded tubes are solution heat-treated at different temperatures and times. The as-extruded condition shows a homogeneous fine-grained microstructure with matrix long-period stacking-ordered (LPSO) structures. Heat treatment at low temperatures and for short times does not significantly change the microstructure but reduces the hardness. Solution heat treatment at relatively high annealing temperatures and long annealing times causes grain growth, resulting in reduced hardness. The microstructure becomes inhomogeneous, medium-sized grains grow, the matrix LPSO structures dissolve, and small bulk LPSO phases develop. The matrix LPSO structures have a positive effect on the corrosion behavior. In particular, the short-term annealing condition shows the most uniform corrosion morphology. Resoloy® is not free of pitting corrosion, but none of the samples fails by cracking.
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85083689159&partnerID=8YFLogxK
U2 - 10.1007/s11837-020-04077-9
DO - 10.1007/s11837-020-04077-9
M3 - Journal articles
AN - SCOPUS:85083689159
VL - 72
SP - 1870
EP - 1879
JO - JOM: Journal of The Minerals, Metals & Materials Society
JF - JOM: Journal of The Minerals, Metals & Materials Society
SN - 1047-4838
IS - 5
ER -