Characteristics of metadynamic recrystallization of a high Nb containing TiAl alloy

Liang Cheng; Hui Chang; Bin Tang; Hongchao Kou; Jinshan Li

doi:10.1016/j.matlet.2012.11.026

Characteristics of metadynamic recrystallization of a high Nb containing TiAl alloy

Liang Cheng, Hui Chang, Bin Tang, Hongchao Kou, Jinshan Li

Northwestern Polytechnical University Xian

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

24 Scopus citations

Abstract

Stress relaxation tests were applied to measure the kinetics of metadynamic recrystallization (MDRX) of a high Nb containing TiAl alloy subsequent to plane strain compression tests executed in the temperature range of 1050-1150 °C and the strain rate range of 0.01-1 s^-1. The results showed that MDRX behavior of the alloy was almost independent on pre-strain and deformation temperature, but significantly dependent on strain rate. The Avrami exponents under different deformation conditions were identified to be about 0.40-0.52. The low Avrami exponents indicate a low MDRX rate during interpass annealing, and these low values are mainly ascribed to the weak driving force for MDRX. Moreover, high Nb additions and multiple phases can further decrease the MDRX rate.

Original language	English
Pages (from-to)	430-432
Number of pages	3
Journal	Materials Letters
Volume	92
DOIs	https://doi.org/10.1016/j.matlet.2012.11.026
State	Published - 2013
Externally published	Yes

Keywords

Kinetics
Metals and alloys
Recrystallization
Stress relaxation

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10.1016/j.matlet.2012.11.026

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title = "Characteristics of metadynamic recrystallization of a high Nb containing TiAl alloy",

abstract = "Stress relaxation tests were applied to measure the kinetics of metadynamic recrystallization (MDRX) of a high Nb containing TiAl alloy subsequent to plane strain compression tests executed in the temperature range of 1050-1150 °C and the strain rate range of 0.01-1 s-1. The results showed that MDRX behavior of the alloy was almost independent on pre-strain and deformation temperature, but significantly dependent on strain rate. The Avrami exponents under different deformation conditions were identified to be about 0.40-0.52. The low Avrami exponents indicate a low MDRX rate during interpass annealing, and these low values are mainly ascribed to the weak driving force for MDRX. Moreover, high Nb additions and multiple phases can further decrease the MDRX rate.",

keywords = "Kinetics, Metals and alloys, Recrystallization, Stress relaxation",

author = "Liang Cheng and Hui Chang and Bin Tang and Hongchao Kou and Jinshan Li",

year = "2013",

doi = "10.1016/j.matlet.2012.11.026",

language = "英语",

volume = "92",

pages = "430--432",

journal = "Materials Letters",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Characteristics of metadynamic recrystallization of a high Nb containing TiAl alloy

AU - Cheng, Liang

AU - Chang, Hui

AU - Tang, Bin

AU - Kou, Hongchao

AU - Li, Jinshan

PY - 2013

Y1 - 2013

N2 - Stress relaxation tests were applied to measure the kinetics of metadynamic recrystallization (MDRX) of a high Nb containing TiAl alloy subsequent to plane strain compression tests executed in the temperature range of 1050-1150 °C and the strain rate range of 0.01-1 s-1. The results showed that MDRX behavior of the alloy was almost independent on pre-strain and deformation temperature, but significantly dependent on strain rate. The Avrami exponents under different deformation conditions were identified to be about 0.40-0.52. The low Avrami exponents indicate a low MDRX rate during interpass annealing, and these low values are mainly ascribed to the weak driving force for MDRX. Moreover, high Nb additions and multiple phases can further decrease the MDRX rate.

AB - Stress relaxation tests were applied to measure the kinetics of metadynamic recrystallization (MDRX) of a high Nb containing TiAl alloy subsequent to plane strain compression tests executed in the temperature range of 1050-1150 °C and the strain rate range of 0.01-1 s-1. The results showed that MDRX behavior of the alloy was almost independent on pre-strain and deformation temperature, but significantly dependent on strain rate. The Avrami exponents under different deformation conditions were identified to be about 0.40-0.52. The low Avrami exponents indicate a low MDRX rate during interpass annealing, and these low values are mainly ascribed to the weak driving force for MDRX. Moreover, high Nb additions and multiple phases can further decrease the MDRX rate.

KW - Kinetics

KW - Metals and alloys

KW - Recrystallization

KW - Stress relaxation

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U2 - 10.1016/j.matlet.2012.11.026

DO - 10.1016/j.matlet.2012.11.026

M3 - 文章

AN - SCOPUS:84871389105

SN - 0167-577X

VL - 92

SP - 430

EP - 432

JO - Materials Letters

JF - Materials Letters

ER -

Characteristics of metadynamic recrystallization of a high Nb containing TiAl alloy

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Keywords

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