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The influence of SLM and EBM technology on material organization in the production of tantalum-titanium alloy

The influence of SLM (selective laser melting) and EBM (electron beam melting) technology on material organization in the production of tantalum-titanium alloy is mainly reflected in microstructure, phase transformation behavior and mechanical properties.

The influence of SLM technology on material organization
1. Fine grains and uniform organization: The high cooling rate of SLM technology (up to 103103 to 108108 K/s) effectively inhibits the growth of grains and forms a fine and uniform microstructure. This fine grain structure helps to improve the strength and toughness of the material.

2. Transformation-induced plasticity (TRIP) and twinning-induced plasticity (TWIP) effects: Transformation-induced plasticity and twinning-induced plasticity often occur in tantalum-titanium alloys prepared by SLM. These effects enhance the ductility of the material and reduce the risk of fracture of the porous structure.

3. Surface quality and corrosion resistance: Tantalum-titanium alloys manufactured by SLM technology have lower surface roughness and improved corrosion resistance. This is due to its excellent surface quality and the formed passivation layer structure, which makes the material perform well in biomedical applications.

The impact of EBM technology on material organization
1. High temperature treatment and densification: EBM is carried out in a high vacuum environment, which can preheat the printing base and powder, which helps to reduce residual thermal stress and reduce internal defects. High temperature treatment makes the material denser and improves the overall performance.

2. Grain growth and isotropy: The high temperature conditions during the EBM process may cause grain growth, but it also helps to achieve a more uniform isotropic microstructure, thereby improving the mechanical properties of the material.

3. Oxidation and impurity control: Since EBM is carried out in a vacuum environment, it can effectively prevent the introduction of impurity elements such as oxygen and nitrogen, which is crucial to improving the purity and performance of tantalum-titanium alloys.

Summary
SLM and EBM technologies each have different effects on material organization in the production of tantalum-titanium alloys. SLM forms fine and uniform grains through rapid cooling, promotes phase transformation-induced plasticity, and helps improve ductility and corrosion resistance; while EBM uses high temperature environment to achieve better densification and isotropy while controlling oxidation and impurities. These two technologies have their own advantages and are suitable for different application scenarios.