A novel crack-free Ti-modified Al-Cu-Mg alloy designed for selective laser melting
By Jinliang Zhang, Jianbao Gao, B. Song, Lijun Zhang, Changjun Han, Chao Cai, Kun Zhou, Yusheng Shi. 2021
222 citations recorded by the source corpus.
Abstract A novel crack-free Ti-modified Al-Cu-Mg alloy for SLM was developed here, based on the thermodynamic calculations of the crack susceptibility index and growth-restriction factor. We found that the introduction of Ti into the Al-Cu-Mg alloy effectively promoted the grain refinement and columnar-to-equiaxed grain transition as a result of the heterogeneous nucleation provided by Al3Ti precipitates. The hot tearing cracks were eliminated after Ti modification due to the formation of the homogeneous and fine equiaxed microstructure. We created a new high-strength Al-Cu-Mg-Ti alloy with a tensile strength of 426.4 MPa, yield strength of 293.2 MPa and ductility of 9.1%. This novel Ti-modified Al alloy with fine equiaxed grains and highly-enhanced mechanical properties offers a new compositional space for the printable lightweight material categories specifically for the SLM technique.
Subfields: Aerospace Engineering, Automotive Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/0d13f46f7f5bc1a3941b7d22e304124e9d815236
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Citations in the corpus
- Towards high-temperature applications of aluminium alloys enabled by additive manufacturing (2021, background): “shown Al3Ta and Al3Ti intermetallics to be effective grain refiners in LPBF of pure Al and Al–Cu–Mg due to favourable lattice matching of Al3Ta and Al3Ti with the Al matrix [86,87], although constitutional supercooling from Ta and Ti dissolved in the matrix likely plays a role in the effectiveness o”