CAJ | 학술논문

为研究N5单晶含取向差TLP接头组织和断裂机理，制备了有取向差和无取向差的接头。对接头微观组织进行SEM检测，跨焊缝进行了EBSD检测，并对接头进行了高温持久拉断试验。结果表明，两侧母材存在10°取向差时焊缝中心无法实现单晶化而形成晶界，晶界处元素偏聚导致在降温过程中形成碳化物和硼化物的第2相粒子；断口分析表明B接头以准解理形式断裂，裂纹起源于第2相粒子。
위연구N5단정함취향차TLP접두조직화단렬궤리，제비료유취향차화무취향차적접두。대접두미관조직진행SEM검측，과한봉진행료EBSD검측，병대접두진행료고온지구랍단시험。결과표명，량측모재존재10°취향차시한봉중심무법실현단정화이형성정계，정계처원소편취도치재강온과정중형성탄화물화붕화물적제2상입자；단구분석표명B접두이준해리형식단렬，렬문기원우제2상입자。
Joints with or without misorienta-tion are prepared in order to discuss the microstructure and fracture mechanism of a joint that with a misorienta-tion. Microstructure is SEM tested, orientation data are observed by the method of EBSD and the high temperature creep rupture tests are carried out. Results show that crys-tal boundary can be found in the center line when there is a 10 degree misorientation between the two parts of base metal. Carbide and boride are formed by the effect of high energy boundary and element segregation. Fracture analy-sis reveals that cracks generate from the second phase par-ticle and the joint fractures in the form of quasi-cleavage fracture.