CAJ | 학술논문

用示差扫描量热仪研究了Ni含量和固溶时效处理对Ti100-xNix(x=33.3-75)合金相变类型和相变温度的影响.结果表明,固溶淬火态Ti10-xNix合金发生B2→B19'一阶段相变,x=40-49时,合金相变温度(TM)保持恒定不变,x=49-52时急剧下降,x=52-56时逐渐升高,Jx=56-70时又保持不变.Ti10-xNix合金在773 K时效3.6 ks和36 Ks后,X=40～50.5时,合金发生B2→B19'一阶段相变,随着x的增加,TM先保持不变,然后突然下降;x=50.5-52时,合金发生B2→R→B19'两阶段相变,随着X的增加,TM渐下降;X=53-70时,合金发生三阶段相变,随着x的增加,相变温度TM1和TM2先升高,后趋于恒定值.Ti100-xNix合金在773 K时效360ks后,除了X=51合金发生B2→R→B19'两阶段相变和X=53合金发生三阶段相变比较特殊外,其余合金都发生B2→B19'一阶段相变.
용시차소묘량열의연구료Ni함량화고용시효처리대Ti100-xNix(x=33.3-75)합금상변류형화상변온도적영향.결과표명,고용쉬화태Ti10-xNix합금발생B2→B19'일계단상변,x=40-49시,합금상변온도(TM)보지항정불변,x=49-52시급극하강,x=52-56시축점승고,Jx=56-70시우보지불변.Ti10-xNix합금재773 K시효3.6 ks화36 Ks후,X=40～50.5시,합금발생B2→B19'일계단상변,수착x적증가,TM선보지불변,연후돌연하강;x=50.5-52시,합금발생B2→R→B19'량계단상변,수착X적증가,TM점하강;X=53-70시,합금발생삼계단상변,수착x적증가,상변온도TM1화TM2선승고,후추우항정치.Ti100-xNix합금재773 K시효360ks후,제료X=51합금발생B2→R→B19'량계단상변화X=53합금발생삼계단상변비교특수외,기여합금도발생B2→B19'일계단상변.
Effects of Ni content and solution-aging treatment on transformation type and transformation temperature of Ti100-xNix (x=33.3-75) alloys were investigated by differential scanning calorimeter (DSC). The results show that one-stage transformation B2→B19' of the solution-quenched Ti100-xNix alloys occurs. The martensitic transformation temperature TM is constant at x = 40-49,decreases sharply at x = 49-52, increases gradually at x = 52-56, and is constant again at x = 56-70. The alloys after aging at 773 K for 3.6 ks and 36 ks will have the occurrence of one-stage transformation B2→B19' at x = 40-50.5, and the TM is constant first andthen decreases suddenly with increasing of x; when x = 50.5-52, the alloys have the occurrence of two-stage transformation B2→R →B19' and the TM decreases gradually with increasing of x; when x=53-70, the alloys have the occurrence of three-stage transformation and the TM1 and TM2 all increase first and then keep constant with increasing ofx. All alloys after aging at 773 K for 360 ks have the occurrence of one-stage transformation B2→B19' except for Ti49Ni51 and Ti47Ni53 alloy, which will have the occurrence of two-stage transformation B2→R→B 19' and three-stage transformation, respectively.