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作者:

Wang, Peng (Wang, Peng.) | Chen, Dongju (Chen, Dongju.) (学者:陈东菊) | Fan, Jinwei (Fan, Jinwei.) | Li, Gang (Li, Gang.)

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EI Scopus SCIE

摘要:

Intelligent additive manufacturing is the future direction, and changing parameters during manufacturing process is an effective measure to adjust the quality of parts. In this study, the stability behavior of the manufacturing process under three process strategies, low layer thickness fabrication (LLTF), high layer thickness fabrication based on the interval of the powder layer thickness (IPLT), and changing of layer thickness strategy (CLTS), was comparatively investigated. Multilayer experiments and mechanical properties experiments were performed during laser powder bed fusion, and the correlation between manufacturing quality and powder layer thickness was compared. By optimizing the process parameters, the surface quality of CLTS is similar to that of LLTF, and the value of minimum surface roughness can be between 22 and 23 mu m. Only balling effect due to spattering and a small amount of porosity were found in the cross-section of CLTS. The relative density of most of the fabricated parts is higher than 99%, and the highest relative density is up to 99.99%. IPLT has longer and thicker martensite than LLTF, and the beta-grain of CLTS is also coarser than LLTF. The tensile properties of CLTS are similar to those of LLTF, and the ultimate tensile strength, yield strength and elongation of CLTS are 1205 MPa, 1107 MPa and 6.8%, respectively. Due to the anisotropy of the LPBF, the horizontally constructed Ti-6Al-4 V specimens yielded higher strengths, while the vertically constructed specimens obtained better elongation. The fracture of the part is characterized by a mixture of brittle fracture, ductile fracture and quasi-dissociative fracture. The surface quality, relative density and mechanical properties of CLTS are similar to those of LLTF, while the forming efficiency is much higher than that of LLTF, which can reach 7.35 mm(3)/s.

关键词:

Microstructure and mechanical properties Changing of layer thickness strategy Laser powder bed fusion Stability behavior Ti-6Al-4 V

作者机构:

  • [ 1 ] [Wang, Peng]Beijing Univ Technol, Fac Mat & Mfg, Mech Ind Key Lab Heavy Machine Tool Digital Design, Ping Leyuan 100, Beijing 100124, Peoples R China
  • [ 2 ] [Chen, Dongju]Beijing Univ Technol, Fac Mat & Mfg, Mech Ind Key Lab Heavy Machine Tool Digital Design, Ping Leyuan 100, Beijing 100124, Peoples R China
  • [ 3 ] [Fan, Jinwei]Beijing Univ Technol, Fac Mat & Mfg, Mech Ind Key Lab Heavy Machine Tool Digital Design, Ping Leyuan 100, Beijing 100124, Peoples R China
  • [ 4 ] [Li, Gang]Beijing Univ Technol, Fac Mat & Mfg, Mech Ind Key Lab Heavy Machine Tool Digital Design, Ping Leyuan 100, Beijing 100124, Peoples R China
  • [ 5 ] [Wang, Peng]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Adv Mfg Technol, Beijing 100124, Peoples R China
  • [ 6 ] [Chen, Dongju]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Adv Mfg Technol, Beijing 100124, Peoples R China
  • [ 7 ] [Fan, Jinwei]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Adv Mfg Technol, Beijing 100124, Peoples R China
  • [ 8 ] [Li, Gang]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Adv Mfg Technol, Beijing 100124, Peoples R China

通讯作者信息:

  • [Chen, Dongju]Beijing Univ Technol, Fac Mat & Mfg, Mech Ind Key Lab Heavy Machine Tool Digital Design, Ping Leyuan 100, Beijing 100124, Peoples R China;;[Chen, Dongju]Beijing Univ Technol, Fac Mat & Mfg, Beijing Key Lab Adv Mfg Technol, Beijing 100124, Peoples R China;;

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来源 :

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY

ISSN: 0268-3768

年份: 2023

期: 5-6

卷: 126

页码: 2249-2267

3 . 4 0 0

JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:19

被引次数:

WoS核心集被引频次: 2

SCOPUS被引频次: 2

ESI高被引论文在榜: 0 展开所有

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中文被引频次:

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