Microstructure and mechanical properties of WE43 magnesium alloy fabricated by direct-chill casting

Low‐cycle fatigue behavior of rolled WE43‐T5 magnesium alloy

“…Strength of the alloy is achieved through solid‐solution hardening and, in particular, through the precipitation hardening by various aging treatments . Y forms precipitates inside grains and along grain boundaries . Additionally, Y has a high solid solubility in Mg introducing the solid‐solution hardening .…”

“…Additionally, Y has a high solid solubility in Mg introducing the solid‐solution hardening . Precipitates contribute to strengthening the material are either globular or plate‐like shaped . Zn also forms Zn‐Zr second phases and, as a result, improves the ductility .…”

“…After rolling in hot conditions, the material is typically heat treated to the T5 condition or T6 condition. The T5 condition is a heat treatment at 205°C for 48 hours, while T6 consists of a 24‐hour long solution treatment at 536°C first and then the same 48‐hour long treatment at 205°C . The key differences between T5 and T6 microstructures of the alloy originate from full recrystallization of the material during the T6 treatment, while the grain structure formed during prior rolling is not altered during the T5 treatment.…”

“…9,10,51 Y forms precipitates inside grains and along grain boundaries. 50,52,53 Additionally, Y has a high solid solubility in Mg introducing the solid-solution hardening. 14,37,39 Precipitates contribute to strengthening the material are either globular or platelike shaped.…”

“…14,37,39 Precipitates contribute to strengthening the material are either globular or platelike shaped. 10,52,54 Zn also forms Zn-Zr second phases and, as a result, improves the ductility. 55 After rolling in hot conditions, the material is typically heat treated to the T5 condition or T6 condition.…”