Microstructure and mechanical property of directionally solidified Ti-46Al-0.5W-0.5Si alloys with and without Gd

被引：7

作者：

Ding, Rengen ^{[1
]}

Jones, Ian P. ^{[1
]}

Chiu, Yulung ^{[1
]}

Chen, Ruirun ^{[2
]}

机构：

[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China

来源：

INTERMETALLICS | 2012年 / 20卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

Titanium aluminides; Mechanical properties at ambient temperature; Microstructure; Electron microscopy; TIAL-BASE ALLOYS; GAMMA-TITANIUM ALUMINIDES; BINARY TI-44AL ALLOY; LAMELLAR STRUCTURES; CREEP-BEHAVIOR; INTERMETALLICS; PHASE; STABILITY; ADDITIONS; BORON;

D O I：

10.1016/j.intermet.2011.08.008

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：

The microstructure and mechanical properties of directionally solidified Ti-46Al-0.5W-0.5Si with and without Gd have been investigated. Ti-46Al-0.5W-0.5Si consists of a nearly fully lamellar (alpha(2)/gamma) structure with gamma/Ti5Si3 eutectic in the interdendritic regions, small Ti5Si3 particles at the alpha(2)/gamma interfaces and some W-rich B2 phase in the dendrites. The addition of Gd brings about the formation of Gd2TiO5 and helps grain refine, thus improving the strength of the alloy. However, the texture of the ingots leads to a strong dependence of the strength on the loading axis. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.

引用

页码：123 / 134

页数：12

共 39 条

[1] Deformation behavior of differently processed γ-titanium aluminides [J].

Bartels, A ;

Kestler, H ;

Clemens, H .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 329 :153-162

[2]

CHU WY, 1999, SCRIPTA METALL MATER, V25, P641

[3] The role of grain size and selected microstructural parameters in strengthening fully lamellar TiAl alloys [J].

Dimiduk, DM ;

Hazzledine, PM ;

Parthasarathy, TA ;

Seshagiri, S ;

Mendiratta, MG .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (01) :37-47

[4] CREEP-BEHAVIOR OF NEAR GAMMA-TIAL BASE ALLOYS - EFFECTS OF MICROSTRUCTURE ALLOY COMPOSITION [J].

ESSOUNI, M ;

BARTELS, A ;

WAGNER, R .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1995, 192 :698-706

[5] EFFECT OF W-ADDITIONS TO TI-48AL-2NB-2CR ALLOYS [J].

FUCHS, GE .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1995, 192 :707-715

[6] The effect of heat treatments on the microstructural stability of the intermetallic Ti-46.5Al-2W-0.5Si [J].

Gil, I ;

Muñoz-Morris, MA ;

Morris, DG .

INTERMETALLICS, 2001, 9 (05) :373-385

[7] The nature of complex precipitates associated with the addition of boron to a gamma-based titanium aluminide [J].

Godfrey, AB ;

Loretto, MH .

INTERMETALLICS, 1996, 4 (01) :47-53

[8]

GSCHNEIDNER KA, 1990, METALS HDB, V2

[9]

HUANG SC, 1991, MATER RES SOC S P, V213, P827

[10] ROOM-TEMPERATURE TENSILE DEFORMATION OF POLYSYNTHETICALLY TWINNED (PST) CRYSTALS OF TIAL [J].

INUI, H ;

OH, MH ;

NAKAMURA, A ;

YAMAGUCHI, M .

ACTA METALLURGICA ET MATERIALIA, 1992, 40 (11) :3095-3104

← 1 2 3 4 →