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机构地区:[1]东北大学理学院,沈阳110004 [2]辽宁工学院材料与化学工程学院,锦州121001
出 处:《金属学报》2006年第4期374-378,共5页Acta Metallurgica Sinica
基 金:国家自然科学基金资助项目50271030
摘 要:基于钛合金的基本组成相α与β的晶体结构特点及原子配位关系,定义了能够判断退火与淬火态钛合金中β稳定元素稳定能力的退火临界晶胞系数CktM和淬火临界晶胞系数CkzM.在不同热处理条件下, β稳定元素稳定能力不同,这与其原子外层电子结构状态及原子分数xatM有关,即CktM与CkzM愈大, β稳定元素M的稳定能力愈强, ∑xatM, ∑CktM, ∑CkzM 愈大,钛合金室温组织中β相的体积分数愈多.在CktM,CkzM及xatM计算的基础上,给出了近似计算了退火态、淬火态钛合金室温组织中α与β相体积分数的方法,计算值与实验值基本符合.Based on the crystal structure characteristics and the relationship of atom coordination in the basic units of a phase and β phase in the titanium alloy, the annealing and quenching critical cell coefficients, Ckt^M and Ckz^M are defined, which can judge the stable ability of the β stable element. The stable ability is different under different heat treatments, and this difference is related to the electron status of atom outer layer and atom percent xat^M. That means the lager the Ckt^M and Ckz^M, the strenger the stable ability of the β stable element M. M.Furthermore, the lager the ∑xat^M, ∑Ckt^M and ∑Ckz^M, the more the volume fraction of β phase at room temperature. In this work, a method was proposed to calculate the volume fractions of the a phase and β phase in titanium alloys annealed and quenched on Ckt^M,Ckz^M,xat^ M the basis of the obtained Ckt^M , Ckz^M and xat^M, the calculated values are consistent with the experimental values.
分 类 号:TG146.2[一般工业技术—材料科学与工程]
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