Printability of alloys for additive manufacturing

By T. Mukherjee, J. Zuback, Amitava De, T. DebRoy. Scientific Reports, 2016

452 citations recorded by the source corpus.

Although additive manufacturing (AM), or three dimensional (3D) printing, provides significant advantages over existing manufacturing techniques, metallic parts produced by AM are susceptible to distortion, lack of fusion defects and compositional changes. Here we show that the printability, or the ability of an alloy to avoid these defects, can be examined by developing and testing appropriate theories. A theoretical scaling analysis is used to test vulnerability of various alloys to thermal distortion. A theoretical kinetic model is used to examine predisposition of different alloys to AM induced compositional changes. A well-tested numerical heat transfer and fluid flow model is used to compare susceptibilities of various alloys to lack of fusion defects. These results are tested and validated with independent experimental data. The findings presented in this paper are aimed at achieving distortion free, compositionally sound and well bonded metallic parts.

Subfields: Automotive Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/3bdec6bb4f755f20799cce5fc75c8d0608c91b18

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. T. DebRoy
2. T. Mukherjee
3. H. Wei
4. Amitava De
5. Gerald L. Knapp
6. Wei Zhang
7. J. Elmer
8. J. Zuback

In Mechanical Engineering

1. T. DebRoy
2. T. Mukherjee
3. H. Wei
4. Amitava De
5. Gerald L. Knapp
6. J. Elmer
7. Wei Zhang
8. J. Zuback

Citations in the corpus

• Building blocks for a digital twin of additive manufacturing (2017, background): “The thermal strain parameter is stated to be a function of laser speed, laser power, and deposit geometry as [5].”
• Optimization and comparison of porosity rate measurement methods of Selective Laser Melted metallic parts (2019, background): “Indeed, it is know that light elements used in alloys processed with SLM or EBM tend to evaporate [36,37], which modify the chemical composition and thus the material density.”
• Fusion zone geometries, cooling rates and solidification parameters during wire arc additive manufacturing (2018, unknown): “Spatial gradient of the surface tension on the top surface of the molten pool results in a shear stress called Marangoni stress, s [3,5].”
• Mitigation of lack of fusion defects in powder bed fusion additive manufacturing (2018, background): “Lack of fusion is detrimental to the mechanical properties of the component, and in extreme cases leads to part rejection [1,3].”