直接时效处理对激光选区熔化GH4099 合金显微组织与力学性能的影响

Shikun Jiao; Qixin Li; Yingying Liu; Yuanhong Qian; Chaoqun Song; Ziang Chen; Dongxue Han; Liang Wang

doi:10.13251/j.issn.0254-6051.2026.04.032

直接时效处理对激光选区熔化GH4099 合金显微组织与力学性能的影响

Translated title of the contribution: Effect of direct aging treatment on microstructure and mechanical properties of GH4099 alloy fabricated by selective laser melting

Shikun Jiao
, Qixin Li
, Yingying Liu
, Yuanhong Qian
, Chaoqun Song
, Ziang Chen
, Dongxue Han
, Liang Wang^*

^*Corresponding author for this work

Beijing Xinghang Electromechanical Equipment Co., Ltd.
Harbin Institute of Technology

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

Abstract

Effect of direct aging treatment on microstructure and mechanical properties of GH4099 superalloy fabricated by selective laser melting (SLM)was investigated. The results indicate that the microstructure of both the GH4099 alloy as-deposited and after direct aging is characterized by columnar grains that grow epitaxially along the deposition direction,and the melt pool structure and subgrain structure are retained after direct aging,while the grain size significantly increases. Meanwhile,the γ′ phase is precipitated in a dispersed manner within the matrix,and carbides are predominantly distributed along the grain boundaries. The mechanical properties of both the GH4099 alloy as-deposited and after direct aging are anisotropy,and it is significantly enhanced after direct aging,with improved strength and ductility.

Translated title of the contribution	Effect of direct aging treatment on microstructure and mechanical properties of GH4099 alloy fabricated by selective laser melting
Original language	Chinese (Traditional)
Pages (from-to)	242-248
Number of pages	7
Journal	Jinshu Rechuli/Heat Treatment of Metals
Volume	51
Issue number	4
DOIs	https://doi.org/10.13251/j.issn.0254-6051.2026.04.032
State	Published - Apr 2026
Externally published	Yes

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title = "直接时效处理对激光选区熔化GH4099 合金显微组织与力学性能的影响",

abstract = "Effect of direct aging treatment on microstructure and mechanical properties of GH4099 superalloy fabricated by selective laser melting (SLM)was investigated. The results indicate that the microstructure of both the GH4099 alloy as-deposited and after direct aging is characterized by columnar grains that grow epitaxially along the deposition direction,and the melt pool structure and subgrain structure are retained after direct aging,while the grain size significantly increases. Meanwhile,the γ′ phase is precipitated in a dispersed manner within the matrix,and carbides are predominantly distributed along the grain boundaries. The mechanical properties of both the GH4099 alloy as-deposited and after direct aging are anisotropy,and it is significantly enhanced after direct aging,with improved strength and ductility.",

keywords = "direct aging treatment, GH4099 superalloy, mechanical properties, microstructure, selective laser melting",

author = "Shikun Jiao and Qixin Li and Yingying Liu and Yuanhong Qian and Chaoqun Song and Ziang Chen and Dongxue Han and Liang Wang",

year = "2026",

month = apr,

doi = "10.13251/j.issn.0254-6051.2026.04.032",

language = "繁体中文",

volume = "51",

pages = "242--248",

journal = "Jinshu Rechuli/Heat Treatment of Metals",

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TY - JOUR

T1 - 直接时效处理对激光选区熔化GH4099 合金显微组织与力学性能的影响

AU - Jiao, Shikun

AU - Li, Qixin

AU - Liu, Yingying

AU - Qian, Yuanhong

AU - Song, Chaoqun

AU - Chen, Ziang

AU - Han, Dongxue

AU - Wang, Liang

PY - 2026/4

Y1 - 2026/4

N2 - Effect of direct aging treatment on microstructure and mechanical properties of GH4099 superalloy fabricated by selective laser melting (SLM)was investigated. The results indicate that the microstructure of both the GH4099 alloy as-deposited and after direct aging is characterized by columnar grains that grow epitaxially along the deposition direction,and the melt pool structure and subgrain structure are retained after direct aging,while the grain size significantly increases. Meanwhile,the γ′ phase is precipitated in a dispersed manner within the matrix,and carbides are predominantly distributed along the grain boundaries. The mechanical properties of both the GH4099 alloy as-deposited and after direct aging are anisotropy,and it is significantly enhanced after direct aging,with improved strength and ductility.

AB - Effect of direct aging treatment on microstructure and mechanical properties of GH4099 superalloy fabricated by selective laser melting (SLM)was investigated. The results indicate that the microstructure of both the GH4099 alloy as-deposited and after direct aging is characterized by columnar grains that grow epitaxially along the deposition direction,and the melt pool structure and subgrain structure are retained after direct aging,while the grain size significantly increases. Meanwhile,the γ′ phase is precipitated in a dispersed manner within the matrix,and carbides are predominantly distributed along the grain boundaries. The mechanical properties of both the GH4099 alloy as-deposited and after direct aging are anisotropy,and it is significantly enhanced after direct aging,with improved strength and ductility.

KW - direct aging treatment

KW - GH4099 superalloy

KW - mechanical properties

KW - microstructure

KW - selective laser melting

UR - https://www.scopus.com/pages/publications/105043622918

U2 - 10.13251/j.issn.0254-6051.2026.04.032

DO - 10.13251/j.issn.0254-6051.2026.04.032

M3 - 文章

AN - SCOPUS:105043622918

SN - 0254-6051

VL - 51

SP - 242

EP - 248

JO - Jinshu Rechuli/Heat Treatment of Metals

JF - Jinshu Rechuli/Heat Treatment of Metals

IS - 4

ER -

直接时效处理对激光选区熔化GH4099 合金显微组织与力学性能的影响

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