Sensitivity of 2198 Al-Li alloy to aging temperature and its precipitation behavior

Saifei Zhang; Weidong Zeng; Wenhua Yang; Chunling Shi; Haojun Wang

Sensitivity of 2198 Al-Li alloy to aging temperature and its precipitation behavior

Saifei Zhang
, Weidong Zeng
, Wenhua Yang
, Chunling Shi
, Haojun Wang

School of Materials Sience and Engineering

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

4 Scopus citations

Abstract

The effect of aging temperature on the microstructure and tensile properties of 2198 Al-Li alloy were investigated by tensile test and TEM. The results show a great dependence of tensile properties on aging temperature in a narrow temperature region before peak aging. When the temperature (150℃~170℃/14 h) increases, the tensile strength rises dramatically; meanwhile the tensile elongation decreases. The main precipitates detected in 2198 alloy are δ', θ', β'/δ', T₁ and σ phase. The combination and morphology of precipitates vary with different aging temperatures; the main precipitates are δ', θ', β'/δ' when aging below 160℃, while above 160℃, T₁ and σ phases come out in large numbers, and become the dominating strengthening phases gradually. It is concluded that the sensitivity of 2198 Al-Li alloy to aging temperature is essentially attributed to the variety and amount of precipitates.

Original language	English
Pages (from-to)	2024-2028
Number of pages	5
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	44
Issue number	8
State	Published - 1 Aug 2015

Keywords

2198 alloy
Aging
Aluminum lithium alloy
Mechanical properties
Microstructure

Cite this

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title = "Sensitivity of 2198 Al-Li alloy to aging temperature and its precipitation behavior",

abstract = "The effect of aging temperature on the microstructure and tensile properties of 2198 Al-Li alloy were investigated by tensile test and TEM. The results show a great dependence of tensile properties on aging temperature in a narrow temperature region before peak aging. When the temperature (150℃\textasciitilde{}170℃/14 h) increases, the tensile strength rises dramatically; meanwhile the tensile elongation decreases. The main precipitates detected in 2198 alloy are δ', θ', β'/δ', T1 and σ phase. The combination and morphology of precipitates vary with different aging temperatures; the main precipitates are δ', θ', β'/δ' when aging below 160℃, while above 160℃, T1 and σ phases come out in large numbers, and become the dominating strengthening phases gradually. It is concluded that the sensitivity of 2198 Al-Li alloy to aging temperature is essentially attributed to the variety and amount of precipitates.",

keywords = "2198 alloy, Aging, Aluminum lithium alloy, Mechanical properties, Microstructure",

author = "Saifei Zhang and Weidong Zeng and Wenhua Yang and Chunling Shi and Haojun Wang",

year = "2015",

month = aug,

day = "1",

language = "英语",

volume = "44",

pages = "2024--2028",

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

issn = "1002-185X",

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TY - JOUR

T1 - Sensitivity of 2198 Al-Li alloy to aging temperature and its precipitation behavior

AU - Zhang, Saifei

AU - Zeng, Weidong

AU - Yang, Wenhua

AU - Shi, Chunling

AU - Wang, Haojun

PY - 2015/8/1

Y1 - 2015/8/1

N2 - The effect of aging temperature on the microstructure and tensile properties of 2198 Al-Li alloy were investigated by tensile test and TEM. The results show a great dependence of tensile properties on aging temperature in a narrow temperature region before peak aging. When the temperature (150℃~170℃/14 h) increases, the tensile strength rises dramatically; meanwhile the tensile elongation decreases. The main precipitates detected in 2198 alloy are δ', θ', β'/δ', T1 and σ phase. The combination and morphology of precipitates vary with different aging temperatures; the main precipitates are δ', θ', β'/δ' when aging below 160℃, while above 160℃, T1 and σ phases come out in large numbers, and become the dominating strengthening phases gradually. It is concluded that the sensitivity of 2198 Al-Li alloy to aging temperature is essentially attributed to the variety and amount of precipitates.

AB - The effect of aging temperature on the microstructure and tensile properties of 2198 Al-Li alloy were investigated by tensile test and TEM. The results show a great dependence of tensile properties on aging temperature in a narrow temperature region before peak aging. When the temperature (150℃~170℃/14 h) increases, the tensile strength rises dramatically; meanwhile the tensile elongation decreases. The main precipitates detected in 2198 alloy are δ', θ', β'/δ', T1 and σ phase. The combination and morphology of precipitates vary with different aging temperatures; the main precipitates are δ', θ', β'/δ' when aging below 160℃, while above 160℃, T1 and σ phases come out in large numbers, and become the dominating strengthening phases gradually. It is concluded that the sensitivity of 2198 Al-Li alloy to aging temperature is essentially attributed to the variety and amount of precipitates.

KW - 2198 alloy

KW - Aging

KW - Aluminum lithium alloy

KW - Mechanical properties

KW - Microstructure

UR - https://www.scopus.com/pages/publications/84944067168

M3 - 文章

AN - SCOPUS:84944067168

SN - 1002-185X

VL - 44

SP - 2024

EP - 2028

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

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

IS - 8

ER -

Sensitivity of 2198 Al-Li alloy to aging temperature and its precipitation behavior

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Keywords

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