Microstructure of directionally solidified Ti-Fe eutectic alloy with low interstitial and high mechanical strength

被引：23

作者：

Contieri, R. J. ^{[1
]}

Lopes, E. S. N. ^{[1
]}

de la Cruz, M. Taquire ^{[1
]}

Costa, A. M. ^{[2
]}

Afonso, C. R. M. ^{[3
]}

Caram, R. ^{[1
]}

机构：

[1] Univ Estadual Campinas, Sch Mech Engn, BR-13083860 Campinas, SP, Brazil

[2] Univ Sao Paulo, Sch Engn Lorena, BR-05508 Sao Paulo, Brazil

[3] Univ Fed Sao Carlos, Dept Mat Engn, BR-13560 Sao Carlos, SP, Brazil

来源：

JOURNAL OF CRYSTAL GROWTH | 2011年 / 333卷 / 01期

基金：

巴西圣保罗研究基金会;

关键词：

Directional solidification; X-ray diffraction; Eutectics; Optical microscopy; Titanium compounds; Alloys; BETA-TITANIUM; LAMELLAR;

D O I：

10.1016/j.jcrysgro.2011.07.007

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The performance of Ti alloys can be considerably enhanced by combining Ti and other elements, causing an eutectic transformation and thereby producing composites in situ from the liquid phase. This paper reports on the processing and characterization of a directionally solidified Ti-Fe eutectic alloy. Directional solidification at different growth rates was carried out in a setup that employs a watercooled copper crucible combined with a voltaic electric arc moving through the sample. The results obtained show that a regular fiber-like eutectic structure was produced and the interphase spacing was found to be a function of the growth rate. Mechanical properties were measured using compression, microindentation and nanoindentation tests to determine the Vickers hardness, compressive strength and elastic modulus. Directionally solidified eutectic samples presented high values of compressive strength in the range of 1844-3000 MPa and ductility between 21.6 and 25.2%. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：40 / 47

页数：8

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