HIGH-TEMPERATURE TENSILE DEFORMATION-BEHAVIOR OF BETA-TI ALLOYS

被引：25

作者：

VIJAYSHANKAR, MN

ANKEM, S

机构：

[1] Engineering Materials Group, Department of Chemical and Nuclear Engineering, University of Maryland, College Park

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1990年 / 129卷 / 02期

关键词：

D O I：

10.1016/0921-5093(90)90270-D

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The high temperature tensile deformation behavior of β-Ti alloys has been investigated as function of strain rate, temperature and type of alloying elements. It was found that the magnitude of the flow stress drop increases with strain rate and solute concentration and decreases with temperature. For a given temperature and strain rate the extent of the drop decreased with a decrease in the relative atomic size between the solvent (titanium) and solute (manganese and vanadium) and a decrease in the diffusivity of the alloying element in the β phase. In addition, it was found that prestraining to a stress below the peak stress significantly reduces the peak stress and the magnitude of the flow stress drop. On the basis of these results it is suggested that the initial flow stress drop is due to the rapid multiplication of dislocations. The steady state behavior after the initial flow stress drop was attributed to dynamic recovery leading to the formation of subgrains. © 1990.

引用

页码：229 / 237

页数：9

共 26 条

[1] A RATIONALIZATION OF STRESS-STRAIN BEHAVIOR OF 2-DUCTILE PHASE ALLOYS [J].

ANKEM, S ;

MARGOLIN, H .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1986, 17 (12) :2209-2226

[2] THE EFFECT OF VOLUME PER CENT OF PHASES ON THE HIGH-TEMPERATURE TENSILE DEFORMATION OF 2-PHASE TI-MN ALLOYS [J].

ANKEM, S ;

SHYUE, JG ;

VIJAYSHANKAR, MN ;

ARSENAULT, RJ .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1989, 111 :51-61

[3]

ARSENAULT RJ, 1964, T METALL SOC AIME, V230, P1570

[4]

BOURELL DL, 1987, J APPL METALWORKING, P15

[5]

FIORE NF, 1967, PROG MATER SCI, V13, P85

[6]

FURUSHIRO N, 1980, TITANIUM 80, P1067

[7] SUPERPLASTICITY IN LARGE GRAINED MATERIALS [J].

GRIFFITHS, P ;

HAMMOND, C .

ACTA METALLURGICA, 1972, 20 (07) :935-+

[8] MODEL FOR YIELDING WITH SPECIAL REFERENCE TO YIELD-POINT PHENOMENA OF IRON AND RELATED BCC METALS [J].

HAHN, GT .

ACTA METALLURGICA, 1962, 10 (AUG) :727-&

[9]

Hall E.O., 1970, YIELD POINT PHENOMEN

[10]

HAMILTON CH, 1984, P C SUPERPLASTIC FOR, P122

← 1 2 3 →