Fracture toughness and microstructure damage behavior of thin Al-Cu alloy fabricated by wire-arc directed energy deposition

被引:5
|
作者
Zhou, Yinghui [1 ]
Lin, Xin [2 ]
Jian, Zengyun [1 ]
Huang, Shixing [1 ]
Ren, Yongming [1 ]
Wu, Yue [1 ]
Yang, Xigang [1 ]
Shao, Wenting [1 ]
机构
[1] Xian Technol Univ, Sch Mat & Chem Engn, Xian 710021, Peoples R China
[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Arc-DED; Al-Cu alloy; Fracture toughness; Equiaxed/columnar heterogeneous; microstructure; Precipitates; MECHANICAL-PROPERTIES; ALUMINUM; STRENGTH;
D O I
10.1016/j.msea.2023.145420
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
This study aimed to investigate the factors influencing the fracture toughness of thin Al-Cu alloy fabricated using Arc-Direct Energy Deposition (Arc-DED). By adjusting process parameters, samples with different microstructure characteristics were obtained, including an air-cooled (AC) deposit with a high proportion of equiaxed grains, a water-cooled (WC) deposit with a high proportion of columnar grains, and a post-heat-treated air-cooled deposit (T6) with numerous nano-sized precipitates. The conditional fracture toughness (KQ)/crack tip opening displacement (CTOD) values for the AC, WC, and T6 samples were 11.7 MPa m1/2/23.27 mu m,11.4 MPa m1/2/ 22.70 mu m, and 17.6 MPa m1/2/22.39 mu m, respectively. The fracture toughness of the T6 sample was 50.4% and 54.4% higher than that of the AC and WC samples, respectively. The heterogeneity of the equiaxed/columnar microstructure affected the distribution of brittle theta-Al2Cu phases and pores, thereby influencing crack behavior. While columnar grains exhibited a stronger capacity for accumulating geometrically necessary dislocations (GNDs) and coordinating deformation compared to equiaxed grains, cracks were more likely to propagate along grain boundaries when the loading direction was parallel to the growth direction of columnar grains. Consequently, flat crack paths were observed in columnar grains, while equiaxed grains displayed tortuous paths. Furthermore, the precipitation of nano-sized theta'-Al2Cu phases contributed to improved fracture toughness. By integrating microstructure characterization, fractographic observation, analysis of uneven grain deformation behavior, and examination of GNDs distribution near crack paths, the study revealed microscopic damage characteristics, fracture behavior, and toughening mechanisms.
引用
收藏
页数:16
相关论文
共 50 条
  • [41] Enhanced wear and corrosion resistance of wire-arc additive manufactured Al-Cu alloy by friction stir processing
    Ren, Guochun
    Zheng, Yang
    Zhong, Pu
    Wang, Tianqi
    Li, Liangyu
    VACUUM, 2025, 233
  • [42] Microstructure evolution and mechanical properties of the wire plus arc additive manufacturing Al-Cu alloy
    Wang, Zhennan
    Lin, Xin
    Wang, Lilin
    Cao, Yang
    Zhou, Yinghui
    Huang, Weidong
    ADDITIVE MANUFACTURING, 2021, 47
  • [43] Comparison of microstructure, mechanical properties and corrosion resistance of Ti6321 alloy by wire-arc directed energy deposition versus rolling
    He, Xin
    Yi, Hao
    Zhang, Wenjun
    Yin, Yanchao
    Liu, Yaqun
    Cao, Huajun
    JOURNAL OF ALLOYS AND COMPOUNDS, 2024, 1005
  • [44] Twinned dendrites growth in wire arc directed energy deposition of Al-Zn-Mg-Cu alloy
    Dong, Bolun
    Cai, Xiaoyu
    Chen, Fukang
    Lin, Sanbao
    Zong, Yingying
    Shan, Debin
    MATERIALS & DESIGN, 2023, 228
  • [45] Twinned dendrites growth in wire arc directed energy deposition of Al-Zn-Mg-Cu alloy
    Dong, Bolun
    Cai, Xiaoyu
    Chen, Fukang
    Lin, Sanbao
    Zong, Yingying
    Shan, Debin
    MATERIALS & DESIGN, 2023, 76
  • [46] Investigation on microstructure characteristics of Ti-48Al alloy fabricated using twin-wire directed energy deposition-plasma arc
    Hanjie Xuebao/Transactions of the China Welding Institution, 2024, 45 (02): : 1 - 6
  • [47] Wire-arc directed energy deposition of high performance heat treatment free Al-6Mg-0.3Sc alloy
    Li, Kai
    Fang, Xuewei
    Yang, Jiannan
    Li, Xinzhi
    Ma, Minghua
    Shang, Jiahao
    Huang, Ke
    JOURNAL OF MANUFACTURING PROCESSES, 2024, 125 : 589 - 603
  • [48] The effect of vanadium on the microstructure and mechanical properties of TiAl alloy fabricated by twin-wire directed energy deposition-arc
    Zhou, Wenlu
    Shen, Chen
    Hua, Xueming
    Wang, Lin
    Zhang, Yuelong
    Li, Fang
    Xin, Jianwen
    Ding, Yuhan
    ADDITIVE MANUFACTURING, 2023, 62
  • [49] Microstructure Evolution and Mechanical Properties of Ti and Zr Micro-Alloyed Al-Cu Alloy Fabricated by Wire + Arc Additive Manufacturing
    Siyue Fan
    Xuming Guo
    Qingwei Jiang
    Zhenhua Li
    Jing Ma
    JOM, 2023, 75 : 4115 - 4127
  • [50] Microstructures and mechanical behaviour of bimetallic structures of tungsten alloy (90WNiFe) and nickel alloy (In625) fabricated by wire-arc directed energy deposition
    Jadhav, Sainand
    Tanvir, Gazi
    Karim, Md Abdul
    Islam, Saiful
    Noh, Sang Do
    Kim, Duck Bong
    VIRTUAL AND PHYSICAL PROTOTYPING, 2024, 19 (01)