CAJ | 학술논문

在820和900℃对Ni36CrTiAl弹性合金进行时效处理,并对其进行拉伸实验,利用金相显微镜、XRD及SEM等手段对处理前后试样的组织结构和断口特征进行了分析表征。结果表明,时效处理前Ni36CrTiAl合金主要以 Ni3(Cr,Al)相为主,断口主要表现为脆性断裂特征。820℃时效后析出了一定数量的 Ni3(Ti,Al)第二相,主要分布在晶界上,断口出现了一定数量的韧窝。900℃时效后,第二相的数量增加,且弥散分布于晶内,断口为韧性断裂特征。
재820화900℃대Ni36CrTiAl탄성합금진행시효처리,병대기진행랍신실험,이용금상현미경、XRD급SEM등수단대처리전후시양적조직결구화단구특정진행료분석표정。결과표명,시효처리전Ni36CrTiAl합금주요이 Ni3(Cr,Al)상위주,단구주요표현위취성단렬특정。820℃시효후석출료일정수량적 Ni3(Ti,Al)제이상,주요분포재정계상,단구출현료일정수량적인와。900℃시효후,제이상적수량증가,차미산분포우정내,단구위인성단렬특정。
In this paper,the Ni36CrTiAl elastic alloy was aged at 820 and 900 ℃ respectively,and a tensile test was carried on the sample before and after aging.The microstructure and fracture characteristics of Ni36CrTiAl elastic alloy were investigated through microscope observation,SEM analysis,and XRD analysis.Results show that the main phase of Ni36CrTiAl alloy was Ni3(Cr,Al)and the fracture was brittle before aging.A certain amount of Ni3(Ti,Al)phase occurred on the grain boundary of Ni36CrTiAl alloy after aging at 820 ℃,and meanwile a certain amount of dimples appeared on the fracture.The second phase increased and dispersed inside grains after aging at 900 ℃ and the fracture showed ductile fracture characteristics.