The microstructure parameters and microhardness of directionally solidified Ti-43A1-3Si alloy

被引：51

作者：

Fan, Jianglei ^{[1
]}

Li, Xinzhong ^{[1
]}

Su, Yanqing ^{[1
]}

Guo, Jingjie ^{[1
]}

Fu, Hengzhi ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjian, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 506卷 / 02期

基金：

美国国家科学基金会;

关键词：

TiAl-based alloy; Directional solidification; Seeding materials; Intermetallics; Microhardness; INTERMETALLIC TI-46AL-2W-0.5SI ALLOY; TIAL/TI3AL LAMELLAR MICROSTRUCTURE; TIAL-SI ALLOYS; PROCESSING PARAMETERS; STRUCTURE EVOLUTION; EUTECTIC ALLOY; GROWTH; DEPENDENCY; SYSTEM; REGION;

D O I：

10.1016/j.jallcom.2010.07.122

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

TiAl-based alloy (Ti-43A1-3Si at.%) was directionally solidified at a constant temperature gradient (G = 20 K/mm) in a wide range of growth rates (5-60 mu m/s) by using a Bridgman type directional solidification furnace. The cellular spacing (lambda), lamellar spacing (lambda(L)), volume fraction of Ti(5)Si(3) phases (f(V)) and microhardness (H(V)) were measured. The values of lambda, lambda(L). and f(V) decrease with increasing growth rate (V). The value of H(V) increases with the increasing values of V and lambda(-0.5)(L), and decreases with the increasing values of lambda, and f(V). The dependence of Hv on V, lambda, lambda(-0.5)(L) and f(V) was determined by linear regression analysis. The fitted exponent values obtained in this work were compared with the previous experimental results for similar alloy systems. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：593 / 599

页数：7

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