Effects of annealing on the microstructure and mechanical properties of selective laser melted AlSi7Mg alloy

By Min Wang, B. Song, Qingsong Wei, Yuanjie Zhang, Yusheng Shi. Materials Science & Engineering: A, 2019

201 citations recorded by the source corpus.

Abstract Selective laser melting, due to the high energy density input and the small interaction time (106 K/s), can result in an ultrafine microstructure and excellent mechanical properties. However, due to the nonuniform nature of the temperature distribution and the transition from liquid to solid, high residual stresses exist. High residual stresses in the parts can increase the risk of material distortion and cause many problems, such as dimensional inaccuracy or cracks. This work systematically investigated the influence of annealing on the microstructure and mechanical properties of SLM-processed AlSi7Mg alloy parts. The residual stresses relaxed significantly after annealing. The Vickers hardness and the tensile stress greatly reduced, while the elongation increased. The fracture mode of the as-fabricated sample was ductile and brittle mixed fracture, whereas the fracture morphology of the annealed sample presented many more dimples, and the elongation also increased, which indicated the ductile mode.

Subfields: Automotive Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/2f62fd8b0bc33bf08d96427a3f070783400339d2

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Automotive Engineering

1. B. Song
2. Yusheng Shi

In Mechanical Engineering

1. Jinliang Zhang
2. B. Song
3. Yusheng Shi

Citations in the corpus

• A review of Laser Powder Bed Fusion Additive Manufacturing of aluminium alloys: Microstructure and properties (2021, unknown): “6Mg) L-PBF 368 275 9 [71] T2 226 150 12.”
• Laser powder bed fusion additive manufacturing of NiTi shape memory alloys: a review (2023, background): “rite grains tend to form in the interior [52, 62, 63].”
• 3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting (2019, unknown): “AlSi7Mg, A356, A357 [151] [152] [148,151,153,154] [151,152]”