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248 ^11108 Hltr-sf=el 4! (3) Ti-Al-tre-si Et+ =4 Ti, Fe, Si6.J?ql "oJCsI grql At+ 60/0 ?zla].€ pl,tlt rzlg Eg =4 o-tr^l r+ *lz3zlEE -J^J^]A B?o14. trB 10-9619 (a)9 =Cg Fe 4o/o, si lo/o, 4rlzl TioJ-I, Et?Bg Ti-4Fe-lsi ol+. =4g +ts s.+"il E+ ulellzlol e =4oltrI. +4g EtI r0o/o, 4* 5o/o, E ol4. (b)el =^Jg Al 60/o, Fe 4o/o, Si 0.So/o r}"lzl Tioll, EtTEg Ti-6AI-4Fe-0.5Si ol4. =4g paeBE pl^ilElel +^JE az\ _il.zl€ =zl oltrI. +49 ElI tTo/o, et So/oalflQ. (a) (x50) (b) (x200) ral 10-96 Ti-Al-Fe-Si-sr= 44 LI. =/.|. aE Ti -Bt= 4^l ( 1 ) Ti-5Zr-0.5Mo-0.25Si241'J# r zl =^I a TiBT*u}]gCg q+ +olzl +l6}q p^J.JeEl g}'= ?zIaI€ o, p EI +ql^l +4+= azlEe| tf, aE,+ol^l +4+= +++ rg Fcg aHl+ p^Jg E+ s'J+ = B?o14. trB 10-97lel =49 (a)E Ti-so/ozr-o.so/oMo-o.zso/osi =^l aB+, a+pt BHgE- +El +q, €+Eg ZA oolt q= +Eg tsla"JlEIEJ a4.4, (b)= Ti-6o/oAt- 2o/oSn-4o/oZr-2o/oMo-0.1o/oSi =^I aEI+, pt oJqgtr+q +4, 4g te-l p^Jgtr E el4^Itl latht9 ulrllxlol E{ ag a4, (c)E (b)e+ F"Jztltrs p^} ojqqs+El ?l ? all 850"c qJ^l ^lE, (TtZr)sitE oJ z|=4 ol 4. +4 g Et 20/o, a t 80/o, E 99o/o4lt'l 619tr}.