Elimination of turned dendrite in laser multilayer deposition of Rene88DT superalloy on DD3 single crystal  

作　　者：张凤英 谭华 陈静 

机构地区：[1]School of Materials Science and Engineering,Chang'an Univeristiy [2]State Key Laboratory of Solidif ication Processing,Northwestern Polytechnical University

出　　处：《Chinese Optics Letters》2012年第4期22-25,共4页中国光学快报（英文版）

基　　金：supported by the National Natu-ral Science Foundation of China(Nos.51105311 and50871089);the State Key Laboratory of Solidification Processing in Northwestern Polytechnical University(No.SKLSP201102);the China Postdoctoral Science Foundation(No.201104679)

摘　　要：Laser multilayer deposition of Rene88DT superalloy on DD3 single-crystal substrate is conducted.The influences of the crystal orientation of the substrate and the profile of the solid/liquid interface of the molten pool on the deposited microstructure are investigated.A unique strategy is proposed by adjusting the angle between the substrate surface and the substrate crystal orientation.This approach prevents the formation of the turned dendrite,thus obtaining a fully directional microstructure in the deposits.Laser multilayer deposition of Rene88DT superalloy on DD3 single-crystal substrate is conducted.The influences of the crystal orientation of the substrate and the profile of the solid/liquid interface of the molten pool on the deposited microstructure are investigated.A unique strategy is proposed by adjusting the angle between the substrate surface and the substrate crystal orientation.This approach prevents the formation of the turned dendrite,thus obtaining a fully directional microstructure in the deposits.

关 键 词：Crystal orientation Microstructure MULTILAYERS SUPERALLOYS 

分 类 号：O734[理学—晶体学] TN249[电子电信—物理电子学]