RT info:eu-repo/semantics/article
T1 Deep cryogenic treatment of HPDC AZ91 magnesium alloys prior to aging and its influence on alloy microstructure and mechanical properties
A1 Preciado Calzada, Mónica
A1 Bravo Díez, Pedro Miguel
A1 Cárdenas Gonzalo, David
K1 HPDC magnesium alloys
K1 Deep cryogenic treatment
K1 Continuous precipitation
K1 Ingeniería civil
K1 Civil engineering
K1 Resistencia de materiales
K1 Strength of materials
AB Studies of deep cryogenic treatment have mainly focused on ferrous alloys, despite the advantages of this form of treatment when applied to other non-ferrous alloys. This study examines the microstructural behavior of a high pressure die-casting (HPDC) AZ91 magnesium alloy, submitted to T6 and T6 with deep cryogenic treatment (DCT) prior to aging. Differences between continuous and discontinuous β-Mg17Al12 phase precipitation are analyzed by means of TEM, SEM and optical microscopy to explain the mechanical behavior following each type of heat treatment. The mechanical properties were improved by both treatments though yield strength was higher following T6 treatment and elongation was greater following T6 with deep cryogenic treatment. The conclusion is that continuous precipitation is promoted by cryogenic treatment, resulting in an improvement of elongation by 20%. This factor is important in view of the limitations of poor plasticity and its consequences for HPDC magnesium alloy applications.
PB Elsevier
SN 0924-0136
YR 2017
FD 2017-01
LK http://hdl.handle.net/10259/8174
UL http://hdl.handle.net/10259/8174
LA eng
NO The authors wish to thank Grupo Antolín Ingeniería S.A, for the financial support and the provision of samples for all tests.
DS Repositorio Institucional de la Universidad de Burgos
RD 24-nov-2024