caa a22 4500 477122183 CHVBK 20180405111639.0 cr unu---uuuuu 170330e19960801xx s 000 0 eng 10.1007/BF03026098 doi (NATIONALLICENCE)springer-10.1007/BF03026098 Development of Al-Rich Al-Ti-V intermetallic alloys with duplex microstructures [Elektronische Daten] [Woong Chang, B. Muddle] The phases, phase relationships and indentation behaviour observed in a series of Al-Ti-V alloys, based on the composition Al3Ti, have been characterised following chill casting and selected isothermal heat treatments. The results define two separate approaches to the development of duplex microstructures containing uniform fine-scale mixtures of metallic ß-(Ti,V) solid solution and an Ll2derived intermetallic phase. Although the chill-cast microstructures of Al70Ti10V20 and Al62Ti10V28 alloys retained metastable intermediate high temperature phases, duplex metallic-intermetallic microstructures, containing uniform fine-scale distributions of metallic ß-(Ti,V) solid solution in a δ-Al3(Ti,V) intermetallic matrix, have been produced in both alloys during isothermal heat treatments at temperatures in the range 1073-1273 K. In contrast, two-stage heat treatments of an Al55Ti10V35 alloy, involving short term homogenisation at 1523 K followed by extended ageing in the range 1073-1273 K, produced a series of fine-scale, two-phase lamellar microstructures, consisting of alternating lamellae of ß phase and twin-related ξ-Ti5Al11 laths. The cracking resistance of samples with such microstructures was significantly enhanced, while the hardness was maintained at or above that of monolithic δ-Al3Ti. Springer, 1996 Chang Woong Research Institute of Industrial Science & Technology, P.O. Box 135, 790-600, Pohang, Korea aut Muddle B. Research Institute of Industrial Science & Technology, P.O. Box 135, 790-600, Pohang, Korea aut Metals and Materials The Korean Institute of Metals and Materials 2/4(1996-08-01), 233-243 1598-9623 2:4<233 1996 2 12540 https://doi.org/10.1007/BF03026098 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF03026098 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chang Woong Research Institute of Industrial Science & Technology, P.O. Box 135, 790-600, Pohang, Korea aut NATIONALLICENCE 700 1- Muddle B. Research Institute of Industrial Science & Technology, P.O. Box 135, 790-600, Pohang, Korea aut NATIONALLICENCE 773 0- Metals and Materials The Korean Institute of Metals and Materials 2/4(1996-08-01), 233-243 1598-9623 2:4<233 1996 2 12540 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer