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作者:

Xie, Ruishan (Xie, Ruishan.) | Shi, Yanchao (Shi, Yanchao.) | Liu, Haibin (Liu, Haibin.) (学者:刘海滨) | Chen, Shujun (Chen, Shujun.)

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EI Scopus SCIE

摘要:

Fusion-based metal additive manufacturing (AM) processes are becoming progressively mature in some material systems. However, the printing of high strength aluminum alloy remains a considerable challenge due to its unavoidable solidification defects. In this study, a novel solid-state additive manufacturing process, being referred to as Friction and Rolling based Additive Manufacturing (FRAM), was developed to print AA6061. The method developed here achieved heat generation and continuous material addition simultaneously, using a modified horizontal CNC machine. The results indicate that fully dense microstructure with defect-free and refined grain was successfully obtained using the FRAM method. The adjacent layers have achieved good bonding without melting because the material at the top surface of the previous layer experience a secondary friction, which can enhance the interface metallurgical bonding and eliminate the potential interface defects. The grain size of the deposited material was significantly reduced compared to that of feeding material because of dynamic recrystallization caused by severe plastic deformation. This also led to the significant increase in elongation of the deposited material. The deposited material showed ductile fracture in both horizontal and vertical directions. The proposed process has the potential to print other non-weldable engineering alloys that are sensitive to solidification defects.

关键词:

Mechanical properties Solid-state Additive manufacturing Microstructure Friction stir processing Aluminum alloy

作者机构:

  • [ 1 ] [Xie, Ruishan]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 2 ] [Shi, Yanchao]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 3 ] [Liu, Haibin]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 4 ] [Chen, Shujun]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China

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来源 :

MATERIALS TODAY COMMUNICATIONS

年份: 2021

卷: 29

3 . 8 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:116

JCR分区:3

被引次数:

WoS核心集被引频次: 24

SCOPUS被引频次: 26

ESI高被引论文在榜: 0 展开所有

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中文被引频次:

近30日浏览量: 6

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