caa a22 4500 465812031 CHVBK 20180323112119.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF02831632 doi (NATIONALLICENCE)springer-10.1007/BF02831632 Tempering process of alloy Ti-5A1-1Mo-2Nb-3Zr [Elektronische Daten] [Yongrui Deng, Pengling Mao, Jialong Xu] A tempering process of alloy Ti-5Al-lMo-2Nb-3Zr has been investigated by using transmission electron micrograph (TEM), x-ray, electric resistance, and positron annihilation techniques in this study. After quenching from 950°C, the alloy consists of a phase and hcp martensite α′. Thin rectangular plates of twins appear in acicular martensites along a $$\left\{ {1 0 \bar 1 1} \right\}$$ crystallographic plane. In tempering below 450°C, no obvious change has been observed with TEM. However, positron annihilation technique has detected some preparation process for martensite precipitation. Between 450 and 600°C, all measures show ß phase separates from martensite. Twin boundary and martensite boundary are the preferred precipitating sites with different nucleation mechanisms. The process proceeds most actively around 600°C. At temperatures higher than 600°C, TEM shows discontinuous β particles distributing along martensite boundaries and inside of martensite plates with Burger's orientation. Heating up to 800°C, an interface phase appears during air cooling. A monolithic layer of the interface phase has been identified as fee lattice with the orientation $$\left( {1 1 0} \right)_\beta //\left( {0 0 1} \right)_m ,\left[ {1 \bar 1 \bar 1} \right]_\beta //\left[ {1 1 0} \right]_m $$ . The striated layer of the interface phase has been identified as $$\left\{ {1 0 \bar 1 1} \right\}\left\langle {1 0 \bar 1 2} \right\rangle $$ twin to a phase. Springer-Verlag New York Inc., 1990 Deng Yongrui University of Science and Technology Beijing, 100083, Beijing, China aut Mao Pengling Shanghai Research Institute of Iron and Steel, 200940, Shanghai, China aut Xu Jialong Shanghai Research Institute of Iron and Steel, 200940, Shanghai, China aut Journal of Heat Treating Springer-Verlag 8/2(1990-09-01), 121-126 0190-9177 8:2<121 1990 8 136 https://doi.org/10.1007/BF02831632 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02831632 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Deng Yongrui University of Science and Technology Beijing, 100083, Beijing, China aut NATIONALLICENCE 700 1- Mao Pengling Shanghai Research Institute of Iron and Steel, 200940, Shanghai, China aut NATIONALLICENCE 700 1- Xu Jialong Shanghai Research Institute of Iron and Steel, 200940, Shanghai, China aut NATIONALLICENCE 773 0- Journal of Heat Treating Springer-Verlag 8/2(1990-09-01), 121-126 0190-9177 8:2<121 1990 8 136 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer