Influence of Lanthanum Addition on Microstructural and Mechanical
Properties of Magnesium-Aluminium-Lithium-lanthanum Alloy 2023-01-5183
Effect of Lanthanum addition on mechanical properties of LA93 along with its
microstructural evolution has been analysed using optical microscopy, scanning
electron microscope (SEM) and energy dispersive spectroscopy (EDS). The phases
of this alloy were identified by X-ray diffraction (XRD). La addition has
resulted in a reformed semi continuous structure with a decrease in grain volume
along the boundary. The morphology shows the formation of Al2La and
Al3La phase while the AlLi in LA93 has decreased. At 1.5 wt% La
addition, the maximum grain refinement is obtained. In LA93+xLa, the
Al2La and Al3La appear as a white long stripy phase
and a white large blocky phase, respectively, and contribute to the increased
strength of the alloy. There is a clear distribution of intermetallic compounds
along the grain boundary of α-Mg and inside the matrix. The ultimate tensile
strength increases by 60% to 112 MPa and hardness increases by 48% when the La
content is 1.5 wt%. This improvement can be attributed to the precipitation of
intermetallic compounds and grain refinement of β-phase which impede the
dislocation motion. The elongation also increased considerably with the
lanthanum addition.
Citation: Manivannan, S., Vallimanalan, A., Daniel Das, A., Marimuthu, S. et al., "Influence of Lanthanum Addition on Microstructural and Mechanical Properties of Magnesium-Aluminium-Lithium-lanthanum Alloy," SAE Technical Paper 2023-01-5183, 2024, https://doi.org/10.4271/2023-01-5183. Download Citation
Author(s):
S. Manivannan, A. Vallimanalan, A. Daniel Das, S. Marimuthu, R. Suresh Balaji
Affiliated:
Karpagam Academy of Higher Education (KAHE), Centre for Mate, PSG College of Arts and Science, Department of Physics, Karpagam Academy of Higher Education (KAHE), Department of M
Pages: 8
Event:
International Conference on Trends in Automotive Parts Systems and Applications
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Materials properties
Microscopy
Tensile strength
Alloys
Rare earth metals
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