Strengthening effect in laser metal deposited Ti6Al4V alloy via layer-by-layer ultrasonic impact treatment

被引：9
作者：
Wang, Fubin [1 ]
Liu, Yuke [1 ]
Zhang, Binbin [2 ]
Jiang, Fengchun [3 ]
Wang, Jiandong [3 ]
Zarinejad, Mehrdad [4 ]
Zheng, Yufeng [5 ]
Tong, Yunxiang [1 ]
机构：
[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Int Joint Lab Adv Nanomat Heilongjiang Prov, Harbin 150001, Peoples R China
[2] Wenzhou Univ, Pingyang Inst Intelligent Mfg, Wenzhou 325035, Peoples R China
[3] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China
[4] PB Res Ctr, Dept Mat Sci & Technol, Oshawa, ON L1H 7K4, Canada
[5] Peking Univ, Sch Mat Sci & Engn, Beijing 100871, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2023年 / 886卷
基金：
中国国家自然科学基金;
关键词：
Laser metal deposition; Ultrasonic impact treatment; Ti6Al4V alloy; Mechanical properties; Microstructure; BEAM MELTING EBM; MECHANICAL-PROPERTIES; HEAT-TREATMENT; VARIANT SELECTION; GRAIN-REFINEMENT; MICROSTRUCTURE; PARTS; RECRYSTALLIZATION; PERFORMANCE; INTEGRATION;
D O I：
10.1016/j.msea.2023.145693
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The present work investigates the influence of incorporation of the layer-by-layer ultrasonic impact treatment (UIT) into the laser metal deposition (LMD) processing of Ti6Al4V alloy. The microstructure and mechanical properties of the samples with/without the assistance of UIT are comparatively studied. The curved shape boundaries of alpha/alpha ' phase with inconsistent misorientation angles and the ultra-fine alpha phase are observed in the UIT-assisted LMD (ULMD) sample. The alpha/alpha ' phase in the ULMD sample is characterized by high-density dislocations, larger lattice strain and distortion in comparison with that in the LMD sample. An ultimate tensile strength of 1386 MPa is obtained in the ULMD sample that exceeds that of the LMD sample by 373 MPa and is superior to the values reported in majority of the previous works. Crystallographic orientation change, increased dislocation density and alpha/alpha ' phase lattice distortion, and formation of ultra-fine alpha grains are found to influence the properties. The present work provides an in-depth understanding of the mechanisms/factors influencing the mechanical strengths of additive-manufactured titanium alloys.
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页数：11
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