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| Effect of particle size and composition on internal shrinkage of Ti6Al4V ELI
powder |
| GUO Qing1，ZHANG Linjia2，BAI Ruimin3，QU Zonghong3，LAI Yunjin3，LIANG Shujin3 |
| 1 Haizhuang Guangzhou Bureau Business Office，Guangzhou 510220，China； 2 Guiyang Military
Representative Office of Haizhuang Guangzhou Bureau，Guiyang 550014，China； 3 Sino-Euro Materials
Technologies of Xi'an Co.，Ltd.，Xian 710018，China |
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Abstract The Ti6Al4V ELI powder prepared by the argon atomization method will inevitably have shrinkage
holes, which will affect its use in the subsequent process. By selecting relevant raw materials to study the cause of
this phenomenon, it is found that for a certain particle size range, when the powder particle size is relatively coarse,
the shrinkage porosity of Ti6Al4V ELI powder is significantly higher than that of fine powder. In addition, when
the process conditions are the same, the powder made from raw materials with high Fe element content has a lower
powder shrinkage porosity than that with lower Fe element content. The particle size of the powder can be reduced
to reduce the shrinkage porosity in the Ti6Al4V ELI powder prepared by the argon atomization method. For the
powder with the particle size of 15-53 μm, the peak value of the powder particle size is preferably 15-30 μm; for
the particle size of 53-150 μm, the peak size of the powder should be 53-106 μm. Another method is controlling the
content of Fe element in the raw material, the shrinkage porosity will be controlled properly when the content of Fe
element is more than 0.2%.
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Received: 09 September 2021
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Corresponding Authors:
白瑞敏(1992—)，女，硕士，工程师，主要研究方向为粉末冶金材料。
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2021, Vol. 31 
