Simulation of cold expansion strengthening of TC21 alloy

Feng Ying Qin; Zhi Yang; Bin Tang; Jin Shan Li

doi:10.3969/j.issn.1007-2012.2014.06.005

Simulation of cold expansion strengthening of TC21 alloy

Feng Ying Qin, Zhi Yang, Bin Tang, Jin Shan Li

School of Materials Sience and Engineering

AVIC The First Aircraft Institute

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

2 Scopus citations

Abstract

Mandrel cold expansion and split-sleeve expansion of TC21 titanium alloy lugs were simulated by elastic-plastic finite element method. Based on the simulation results, the residual stress distributions around the hole were analyzed. Combining the fatigue experiments of lugs after mandrel cold expansion and split-sleeve expansion, the strengthening effects of the two processes were evaluated. Results show that the residual stress distributions along the direction of radial, circumferential and thickness have some changes. The distribution of the residual stress after mandrel cold expansion is more uniform than that after split-sleeve expansion. Both the two kinds of processes can strengthen the holes, while the effect of mandrel cold expansion is much better.

Original language	English
Pages (from-to)	26-30
Number of pages	5
Journal	Suxing Gongcheng Xuebao/Journal of Plasticity Engineering
Volume	21
Issue number	6
DOIs	https://doi.org/10.3969/j.issn.1007-2012.2014.06.005
State	Published - 28 Dec 2014

Keywords

Cold expansion
Fatigue
Finite element method
Residual stress

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10.3969/j.issn.1007-2012.2014.06.005

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title = "Simulation of cold expansion strengthening of TC21 alloy",

abstract = "Mandrel cold expansion and split-sleeve expansion of TC21 titanium alloy lugs were simulated by elastic-plastic finite element method. Based on the simulation results, the residual stress distributions around the hole were analyzed. Combining the fatigue experiments of lugs after mandrel cold expansion and split-sleeve expansion, the strengthening effects of the two processes were evaluated. Results show that the residual stress distributions along the direction of radial, circumferential and thickness have some changes. The distribution of the residual stress after mandrel cold expansion is more uniform than that after split-sleeve expansion. Both the two kinds of processes can strengthen the holes, while the effect of mandrel cold expansion is much better.",

keywords = "Cold expansion, Fatigue, Finite element method, Residual stress",

author = "Qin, {Feng Ying} and Zhi Yang and Bin Tang and Li, {Jin Shan}",

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doi = "10.3969/j.issn.1007-2012.2014.06.005",

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T1 - Simulation of cold expansion strengthening of TC21 alloy

AU - Qin, Feng Ying

AU - Yang, Zhi

AU - Tang, Bin

AU - Li, Jin Shan

PY - 2014/12/28

Y1 - 2014/12/28

N2 - Mandrel cold expansion and split-sleeve expansion of TC21 titanium alloy lugs were simulated by elastic-plastic finite element method. Based on the simulation results, the residual stress distributions around the hole were analyzed. Combining the fatigue experiments of lugs after mandrel cold expansion and split-sleeve expansion, the strengthening effects of the two processes were evaluated. Results show that the residual stress distributions along the direction of radial, circumferential and thickness have some changes. The distribution of the residual stress after mandrel cold expansion is more uniform than that after split-sleeve expansion. Both the two kinds of processes can strengthen the holes, while the effect of mandrel cold expansion is much better.

AB - Mandrel cold expansion and split-sleeve expansion of TC21 titanium alloy lugs were simulated by elastic-plastic finite element method. Based on the simulation results, the residual stress distributions around the hole were analyzed. Combining the fatigue experiments of lugs after mandrel cold expansion and split-sleeve expansion, the strengthening effects of the two processes were evaluated. Results show that the residual stress distributions along the direction of radial, circumferential and thickness have some changes. The distribution of the residual stress after mandrel cold expansion is more uniform than that after split-sleeve expansion. Both the two kinds of processes can strengthen the holes, while the effect of mandrel cold expansion is much better.

KW - Cold expansion

KW - Fatigue

KW - Finite element method

KW - Residual stress

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DO - 10.3969/j.issn.1007-2012.2014.06.005

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SN - 1007-2012

VL - 21

SP - 26

EP - 30

JO - Suxing Gongcheng Xuebao/Journal of Plasticity Engineering

JF - Suxing Gongcheng Xuebao/Journal of Plasticity Engineering

IS - 6

ER -

Simulation of cold expansion strengthening of TC21 alloy

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Keywords

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