Influence of Process Variables on the Structure of Mechanically Alloyed Ti_3Al-base Intermetallics

作     者：Chen Guohao Suryanarayana C.and Froes F.H.(Sam)Institute for Materials and Advanced Processes,University of Idaho,Moscow,ID 83843-4195,U.S.A. 

作者机构：University of Idaho 美国 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：1993年第12卷第4期

页      面：241-249页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：Mechanical alloying Titanium alloys Structure evolution Process variables Milling maps 

摘      要：During mechanical alloying variables such as the type of mill,milling intensity,milling time,milling at- mosphere and ball-to-powder weight ratio(BPR)affect the morphology and constitution of the product. The effect of milling time,milling atmosphere and BPR on the nature of the product formed in mechanical- ly alloyed pure Ti and blended elemental binary Ti-Al,and ternary Ti-AI-Nb alloy powders was described. Mechanical alloying of pure titanium results,after long milling times,in the formation of an fcc *** the binary alloy,a solid solution of aluminum in titanium,an amorphous phase,and a fcc phase form with increasing milling *** fcc phase,which is probably a result of TiN formation,occurs more rapidly in air or nitrogen than in an inert *** of the B2 phase in the ternary alloys depends both on alloy composition and the milling atmosphere,with 100％ formation in all atmospheres in Ti-25Al-25Nb but not in Ti-24Al-11Nb,and an inert atmosphere favoring *** times required for the formation of the different phases decrease as the BPR increases;but their sequence is *** on this infor- mation,“milling mapswhich describe phase formation as a function of the BPR and milling time are con- *** from the milling balls increased as the BPR was increased.