The Change of Processing Maps in Hot Compression Procession for Ti-6.0Al-7.0Nb Biomedical Titanium Alloy

Yan Hui Liu; Ze Kun Yao; Yong Quan Ning; Hong Zhen Guo; Zhang Long Zhao

doi:10.4028/www.scientific.net/AMR.906.254

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 906The Change of Processing Maps in Hot Compression...

The Change of Processing Maps in Hot Compression Procession for Ti-6.0Al-7.0Nb Biomedical Titanium Alloy

Abstract:

Isothermal compression tests were carried out on Ti-6.0Al-7.0Nb biomedical titanium alloy at the temperatures of 750900°C (all below β phase transition temperature about 1010°C) and strain rates of 0.0011.0s^-1. The processing maps were constructed to evaluate the efficiency of power dissipation (η) and recognize the flow instability regimes. True strain takes great effect on the efficiency of power dissipation η under the different temperatures and strain rates. The value of power dissipation η increases from 0.1 to 0.7 in most areas. When the strain is 0.9, the value of power dissipation η in most regimes is from 30% to 40%. There are two instability regimes respectively located around 780°C/1.0s^-1 and 860-900°C/0.001-0.01s^-1 when the strains are below 0.5. One of the instability regimes disappears when the strains are 0.5-0.7. When the strain is 0.9, there are still two instability regimes. The safe regime located around 780-840°C/0.1-0.01s^-1, and hot deformation can be carried out in this area.

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Periodical:

Advanced Materials Research (Volume 906)

Pages:

254-258

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.906.254

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Online since:

April 2014

Authors:

Yan Hui Liu*, Ze Kun Yao, Yong Quan Ning, Hong Zhen Guo, Zhang Long Zhao

Keywords:

Flow Instability, Hot Compression Procession, Hot Deformation Behavior, Processing Map, Ti-6.0Al-7.0Nb Biomedical Titanium Alloy

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