Study on the age-hardening mechanism of Rene'88DT superalloy by laser rapid forming

Xiaoming Zhao; Jing Chen; Fei He; Xin Lin; Weidong Huang

Study on the age-hardening mechanism of Rene'88DT superalloy by laser rapid forming

Xiaoming Zhao, Jing Chen, Fei He, Xin Lin, Weidong Huang

材料学院

Northwestern Polytechnical University Xian

科研成果: 期刊稿件 › 文章 › 同行评审

7 引用（Scopus）

摘要

The γ′ precipitation evolution at different aging time and the mechanical properties of laser rapid forming (LRF) processing of Rene'88DT superalloy were investigated. It was found that the tiny γ′ precipitation grew a little with the increase of aging time, but precipitation coarsening took place because of mutual swallowing among precipitates. Especially after 40 h aging treatment, precipitation coarsening was obvious. The hardness testing of LRF Rene'88DT after different aging time was done. The result showed that there was a peak value of HRC 49 after 28 h aging treatment. Based on the results the process of 1165°C, 2 hair cooling solution treatment+760°C, 16 h and 28 h aging treatment was selected to heat treat the LRF Rene'88DT tensile bars. The results showed the tensile strength after the process increased by 400 MPa, compared to as-deposition strength. The yield strength was even equal to that of the powder forging standard.

源语言	英语
页（从-至）	2208-2211
页数	4
期刊	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
卷	36
期	12
出版状态	已出版 - 12月 2007

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@article{7eb987f868594a979de94edfaad4e655,

title = "Study on the age-hardening mechanism of Rene'88DT superalloy by laser rapid forming",

abstract = "The γ′ precipitation evolution at different aging time and the mechanical properties of laser rapid forming (LRF) processing of Rene'88DT superalloy were investigated. It was found that the tiny γ′ precipitation grew a little with the increase of aging time, but precipitation coarsening took place because of mutual swallowing among precipitates. Especially after 40 h aging treatment, precipitation coarsening was obvious. The hardness testing of LRF Rene'88DT after different aging time was done. The result showed that there was a peak value of HRC 49 after 28 h aging treatment. Based on the results the process of 1165°C, 2 hair cooling solution treatment+760°C, 16 h and 28 h aging treatment was selected to heat treat the LRF Rene'88DT tensile bars. The results showed the tensile strength after the process increased by 400 MPa, compared to as-deposition strength. The yield strength was even equal to that of the powder forging standard.",

keywords = "γ′ precipitation coarsening, Age-hardening, Hardness, Laser rapid forming, Rene'88DT superalloy, Tensile properties",

author = "Xiaoming Zhao and Jing Chen and Fei He and Xin Lin and Weidong Huang",

year = "2007",

month = dec,

language = "英语",

volume = "36",

pages = "2208--2211",

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

issn = "1002-185X",

publisher = "Science Press ",

number = "12",

}

TY - JOUR

T1 - Study on the age-hardening mechanism of Rene'88DT superalloy by laser rapid forming

AU - Zhao, Xiaoming

AU - Chen, Jing

AU - He, Fei

AU - Lin, Xin

AU - Huang, Weidong

PY - 2007/12

Y1 - 2007/12

N2 - The γ′ precipitation evolution at different aging time and the mechanical properties of laser rapid forming (LRF) processing of Rene'88DT superalloy were investigated. It was found that the tiny γ′ precipitation grew a little with the increase of aging time, but precipitation coarsening took place because of mutual swallowing among precipitates. Especially after 40 h aging treatment, precipitation coarsening was obvious. The hardness testing of LRF Rene'88DT after different aging time was done. The result showed that there was a peak value of HRC 49 after 28 h aging treatment. Based on the results the process of 1165°C, 2 hair cooling solution treatment+760°C, 16 h and 28 h aging treatment was selected to heat treat the LRF Rene'88DT tensile bars. The results showed the tensile strength after the process increased by 400 MPa, compared to as-deposition strength. The yield strength was even equal to that of the powder forging standard.

AB - The γ′ precipitation evolution at different aging time and the mechanical properties of laser rapid forming (LRF) processing of Rene'88DT superalloy were investigated. It was found that the tiny γ′ precipitation grew a little with the increase of aging time, but precipitation coarsening took place because of mutual swallowing among precipitates. Especially after 40 h aging treatment, precipitation coarsening was obvious. The hardness testing of LRF Rene'88DT after different aging time was done. The result showed that there was a peak value of HRC 49 after 28 h aging treatment. Based on the results the process of 1165°C, 2 hair cooling solution treatment+760°C, 16 h and 28 h aging treatment was selected to heat treat the LRF Rene'88DT tensile bars. The results showed the tensile strength after the process increased by 400 MPa, compared to as-deposition strength. The yield strength was even equal to that of the powder forging standard.

KW - γ′ precipitation coarsening

KW - Age-hardening

KW - Hardness

KW - Laser rapid forming

KW - Rene'88DT superalloy

KW - Tensile properties

UR - http://www.scopus.com/inward/record.url?scp=38949170688&partnerID=8YFLogxK

M3 - 文章

AN - SCOPUS:38949170688

SN - 1002-185X

VL - 36

SP - 2208

EP - 2211

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

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

IS - 12

ER -

Study on the age-hardening mechanism of Rene'88DT superalloy by laser rapid forming

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