Micro & Nano
Advanced Metal
Powders Solutions

Detection of Internal Pores in Ti6Al4V Powder

2019-08-08 18:26

1. Detection Method: Metallographic Analysis

2. Principle: Detect internal appearance of powder using metallographic microscope.

3. Detection Results:

metallographic Images

                                     #1 (sample from VTECH)

                                        #2 (sample from VTECH)

                                       #3 (sample from VTECH)
(Remark: Black spots on powder are resin adhesive used for fixture.)

Conclusion: No obvious internal pore in particle of powder samples was found. 

2) SEM Images

                              #1 (sample from VTECH)

                              #2 (sample from VTECH)

Conclusion: No obvious crack on particle of powder samples was found. Sphericity of particle is high. 

2) Typical internal pores in particle of powder

(Remark: Images of typical internal pores in particle of powder are from bibliography.)

4. Reason of forming internal pores in particle of powder
Internal pores in particle of powder are formed in gas atomization process. Inert gas that can’t be dissolved in metal, enter into atomized fused drops. A mass of cold gas cool fused drops rapidly, internal pores are formed in concretionary particles. 

The unique technology “Rapid Atomization”that developed by VTECH, atomize metal liquid with very low volume of gas and thermal-flame. Doing that can reduce gas impurities in powder, and also give adequate balling time to avoid from shaping internal pores.

5. Features of VTECH’s Ti6Al4V Powder
High Purity: Strict control on oxygen, nitrogen, hydrogen content.
Good Flowability: High spheroidization rate, high sphericity, smooth surface.
High Density: No internal porosity, high apparent density and tap density.


Contact Us
Vday Additive Manufacturing Technology Co., Ltd.
Add:No.A6-403 Lugu International Industrial Park,
Hi-Tech District,Changsha City,Hunan
Tel: +86-731-89747761
Fax: +86-731-89747762
E-Mail: info@vdaypowder.com