Microstructure and Microhardness of Laser Forming Repaired K418 Superalloy

Jianrui Liu; Meng Wang; Xin Lin; Penghui Lu; Weidong Huang

doi:10.15980/j.tzzz.2019.11.008

Microstructure and Microhardness of Laser Forming Repaired K418 Superalloy

Jianrui Liu, Meng Wang, Xin Lin, Penghui Lu, Weidong Huang

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

Abstract

The microstructure and microhardness of laser forming repaired (LFRed) K418 superalloy were investigated. The results reveal that the LFRed sample can be divided into cast substrate zone (CSZ), heat-affected zone (HAZ) and laser repaired zone (LRZ). The microstructures with different morphology, size and number are composed of γ-FeCr_0.29Ni_0.16C_0.06 matrix phases, γ'-Ni₃Al phases and MC carbides phases. The LFRed sample presents a compact metallurgical bonding between CZS and LRZ. The LRZ presents columnar dendrites which grew epitaxially along the direction of deposition and a consecutive layer structure. There are difference in microhardness because of difference in grains size at the same deposition layer. The average microhardness of CSZ, HZA and LRZ reach 432.4, 499.4 and 490.6 HV, respectively.

Translated title of the contribution	激光成形修复K418高温合金的微观组织与硬度
Original language	English
Pages (from-to)	1187-1191
Number of pages	5
Journal	Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys
Volume	39
Issue number	11
DOIs	https://doi.org/10.15980/j.tzzz.2019.11.008
State	Published - 20 Nov 2019

Keywords

K418 Superalloy
Laser Additive Manufacturing
Laser Forming Repairing
Microhardness
Microstructure

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10.15980/j.tzzz.2019.11.008

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title = "Microstructure and Microhardness of Laser Forming Repaired K418 Superalloy",

abstract = "The microstructure and microhardness of laser forming repaired (LFRed) K418 superalloy were investigated. The results reveal that the LFRed sample can be divided into cast substrate zone (CSZ), heat-affected zone (HAZ) and laser repaired zone (LRZ). The microstructures with different morphology, size and number are composed of γ-FeCr0.29Ni0.16C0.06 matrix phases, γ'-Ni3Al phases and MC carbides phases. The LFRed sample presents a compact metallurgical bonding between CZS and LRZ. The LRZ presents columnar dendrites which grew epitaxially along the direction of deposition and a consecutive layer structure. There are difference in microhardness because of difference in grains size at the same deposition layer. The average microhardness of CSZ, HZA and LRZ reach 432.4, 499.4 and 490.6 HV, respectively.",

keywords = "K418 Superalloy, Laser Additive Manufacturing, Laser Forming Repairing, Microhardness, Microstructure",

author = "Jianrui Liu and Meng Wang and Xin Lin and Penghui Lu and Weidong Huang",

year = "2019",

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doi = "10.15980/j.tzzz.2019.11.008",

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volume = "39",

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journal = "Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys",

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TY - JOUR

T1 - Microstructure and Microhardness of Laser Forming Repaired K418 Superalloy

AU - Liu, Jianrui

AU - Wang, Meng

AU - Lin, Xin

AU - Lu, Penghui

AU - Huang, Weidong

PY - 2019/11/20

Y1 - 2019/11/20

N2 - The microstructure and microhardness of laser forming repaired (LFRed) K418 superalloy were investigated. The results reveal that the LFRed sample can be divided into cast substrate zone (CSZ), heat-affected zone (HAZ) and laser repaired zone (LRZ). The microstructures with different morphology, size and number are composed of γ-FeCr0.29Ni0.16C0.06 matrix phases, γ'-Ni3Al phases and MC carbides phases. The LFRed sample presents a compact metallurgical bonding between CZS and LRZ. The LRZ presents columnar dendrites which grew epitaxially along the direction of deposition and a consecutive layer structure. There are difference in microhardness because of difference in grains size at the same deposition layer. The average microhardness of CSZ, HZA and LRZ reach 432.4, 499.4 and 490.6 HV, respectively.

AB - The microstructure and microhardness of laser forming repaired (LFRed) K418 superalloy were investigated. The results reveal that the LFRed sample can be divided into cast substrate zone (CSZ), heat-affected zone (HAZ) and laser repaired zone (LRZ). The microstructures with different morphology, size and number are composed of γ-FeCr0.29Ni0.16C0.06 matrix phases, γ'-Ni3Al phases and MC carbides phases. The LFRed sample presents a compact metallurgical bonding between CZS and LRZ. The LRZ presents columnar dendrites which grew epitaxially along the direction of deposition and a consecutive layer structure. There are difference in microhardness because of difference in grains size at the same deposition layer. The average microhardness of CSZ, HZA and LRZ reach 432.4, 499.4 and 490.6 HV, respectively.

KW - K418 Superalloy

KW - Laser Additive Manufacturing

KW - Laser Forming Repairing

KW - Microhardness

KW - Microstructure

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DO - 10.15980/j.tzzz.2019.11.008

M3 - 文章

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SN - 1001-2249

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EP - 1191

JO - Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys

JF - Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys

IS - 11

ER -

Microstructure and Microhardness of Laser Forming Repaired K418 Superalloy

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Keywords

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