Dependence of flow stress of 8.5Nb-TiAl based alloys on strain rate and temperature

Yunqi Yan; Lian Zhou; Guozhen Luo

Dependence of flow stress of 8.5Nb-TiAl based alloys on strain rate and temperature

Yunqi Yan, Lian Zhou, Guozhen Luo

Northwest Institute for Nonferrous Metal Research

Research output: Contribution to journal › Article › peer-review

Abstract

The behavior of high temperature compression deformation for 8.5Nb-TiAl based alloys was studied in this paper. Ti45Al-8.5Nb-0.2W-0.2Mo-0.05Y (TAMWY) and Ti-45Al-8.5Nb-0.2W-0.2Mo-0.3B (TAMWB) exhibit the softening state during the compression tests at 760°C∼1 000°C. The dual logarithm of true stress and true strain for these two alloys is coincided with linear relationship. At above mentioned temperatures, the strain sensitivity m for TAMWY and TAMWB alloy is 0.06∼ 0.09 and 0.06∼0.08 respectively. The activation energy of high temperature deformation is 243kJ/mol, 279kJ/mol and 287kJ/mol for TAMWB alloy; 289kJ/mol, 327kJ/mol and 345kJ/mol for TAMWY alloy. These two alloys are deformed easily at 760°C ∼1 000°C. The deformed constitutive equations for TAMWB and TAMWY alloys are showed as follows: for TAMWB,ε = 6.3 σ^13-7exp(-270 000//RT); for TAMWY, ε̇= 6.6σ^14.1exp(-320 000/RT).

Original language	English
Pages (from-to)	217
Number of pages	1
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	30
Issue number	SUPPL.
State	Published - 2001
Externally published	Yes

Keywords

8.5Nb-TiAl based alloys
Flow stress
True strain
True stress

Cite this

@article{24ecb4097b634c088ca8db156faf33b8,

title = "Dependence of flow stress of 8.5Nb-TiAl based alloys on strain rate and temperature",

abstract = "The behavior of high temperature compression deformation for 8.5Nb-TiAl based alloys was studied in this paper. Ti45Al-8.5Nb-0.2W-0.2Mo-0.05Y (TAMWY) and Ti-45Al-8.5Nb-0.2W-0.2Mo-0.3B (TAMWB) exhibit the softening state during the compression tests at 760°C∼1 000°C. The dual logarithm of true stress and true strain for these two alloys is coincided with linear relationship. At above mentioned temperatures, the strain sensitivity m for TAMWY and TAMWB alloy is 0.06∼ 0.09 and 0.06∼0.08 respectively. The activation energy of high temperature deformation is 243kJ/mol, 279kJ/mol and 287kJ/mol for TAMWB alloy; 289kJ/mol, 327kJ/mol and 345kJ/mol for TAMWY alloy. These two alloys are deformed easily at 760°C ∼1 000°C. The deformed constitutive equations for TAMWB and TAMWY alloys are showed as follows: for TAMWB,ε = 6.3 σ13-7exp(-270 000//RT); for TAMWY, {\.ε}= 6.6σ14.1exp(-320 000/RT).",

keywords = "8.5Nb-TiAl based alloys, Flow stress, True strain, True stress",

author = "Yunqi Yan and Lian Zhou and Guozhen Luo",

year = "2001",

language = "英语",

volume = "30",

pages = "217",

journal = "Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering",

issn = "1002-185X",

publisher = "Science Press ",

number = "SUPPL.",

}

TY - JOUR

T1 - Dependence of flow stress of 8.5Nb-TiAl based alloys on strain rate and temperature

AU - Yan, Yunqi

AU - Zhou, Lian

AU - Luo, Guozhen

PY - 2001

Y1 - 2001

N2 - The behavior of high temperature compression deformation for 8.5Nb-TiAl based alloys was studied in this paper. Ti45Al-8.5Nb-0.2W-0.2Mo-0.05Y (TAMWY) and Ti-45Al-8.5Nb-0.2W-0.2Mo-0.3B (TAMWB) exhibit the softening state during the compression tests at 760°C∼1 000°C. The dual logarithm of true stress and true strain for these two alloys is coincided with linear relationship. At above mentioned temperatures, the strain sensitivity m for TAMWY and TAMWB alloy is 0.06∼ 0.09 and 0.06∼0.08 respectively. The activation energy of high temperature deformation is 243kJ/mol, 279kJ/mol and 287kJ/mol for TAMWB alloy; 289kJ/mol, 327kJ/mol and 345kJ/mol for TAMWY alloy. These two alloys are deformed easily at 760°C ∼1 000°C. The deformed constitutive equations for TAMWB and TAMWY alloys are showed as follows: for TAMWB,ε = 6.3 σ13-7exp(-270 000//RT); for TAMWY, ε̇= 6.6σ14.1exp(-320 000/RT).

AB - The behavior of high temperature compression deformation for 8.5Nb-TiAl based alloys was studied in this paper. Ti45Al-8.5Nb-0.2W-0.2Mo-0.05Y (TAMWY) and Ti-45Al-8.5Nb-0.2W-0.2Mo-0.3B (TAMWB) exhibit the softening state during the compression tests at 760°C∼1 000°C. The dual logarithm of true stress and true strain for these two alloys is coincided with linear relationship. At above mentioned temperatures, the strain sensitivity m for TAMWY and TAMWB alloy is 0.06∼ 0.09 and 0.06∼0.08 respectively. The activation energy of high temperature deformation is 243kJ/mol, 279kJ/mol and 287kJ/mol for TAMWB alloy; 289kJ/mol, 327kJ/mol and 345kJ/mol for TAMWY alloy. These two alloys are deformed easily at 760°C ∼1 000°C. The deformed constitutive equations for TAMWB and TAMWY alloys are showed as follows: for TAMWB,ε = 6.3 σ13-7exp(-270 000//RT); for TAMWY, ε̇= 6.6σ14.1exp(-320 000/RT).

KW - 8.5Nb-TiAl based alloys

KW - Flow stress

KW - True strain

KW - True stress

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M3 - 文章

AN - SCOPUS:24044551051

SN - 1002-185X

VL - 30

SP - 217

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - SUPPL.

ER -

Dependence of flow stress of 8.5Nb-TiAl based alloys on strain rate and temperature

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Keywords

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