Influence of directional solidification variables on primary dendrite arm spacing of Ni-based superalloy DZ125

查看全文 作　　者：Zhang Weiguo Liu Lin Huang Taiwen Zhao Xinbao Qu Min Yu Zhuhuan Fu [1]Hengzhi

机构地区：[1]State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China

出　　处：《China Foundry》索引2009年第6卷第4期,共5页

基　　金：supported by the National Natural Science Foundation of China(50771081,50827102);the National Basic Research Program of China(2006CB605202) 摘　　要：The primary dendrite morphology and spacing of DZ125 superalloy have been observed during directional solidification under high thermal gradient about 500 K/cm.The results reveal that the primary dendrite arm spacing decreases from 94μm to 35.8μm with the increase of directional solidification cooling rate from 2.525 K/s to 36.4 K/s.The regression equation of the primary dendrite arm spacingsλ 1 versus cooling rate is λ 1 =0.013(GV)-0.32.The predictions of Kurz/Fisher model and Hunt/Lu model accord reasonably well with the experimental data.The influence of directional solidi fication rate under variable thermal gradient on the primary dendrite arm spacing has also been investigated. 关键词：枝晶臂间距镍基高温合金定向凝固冷却速度凝固过程回归方程实验数据热梯度

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Influence of directional solidification variables on primary dendrite arm spacing of Ni-based superalloy DZ125

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耦合文献(16)

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