Article
Materials Science, Multidisciplinary
Chetana Madhukar Suryawanshi, Bhanupratap Gaur, Amit Kumar Singh, Deepak Soman, Samrat Sagar, Ravi Bhallamudi, Sushil Mishra
Summary: Additive manufacturing technologies such as direct metal Laser sintering or powder bed fusion enable the fabrication of complex-shaped biomedical implants. This study used nine different combinations of process parameters to fabricate biocompatible Ti-6Al-4 V samples, and determined the optimal printing parameters through mechanical and microstructural analysis. The analysis revealed that parts built with a volumetric energy density input of 37-93 J/mm3 are defect-free and suitable for biomedical implant applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
K. L. Rutkowski, R. K. Everett, S. M. Storck, M. Zupan
Summary: This study analyzed direct metal laser sintered Ti-6Al-4V samples with intentionally induced defects using microtensile testing techniques. The samples with defects showed significantly higher microtensile ultimate strengths than macrotensile strengths, and the Weibull microtensile moduli were smaller, indicating greater variability. Comparing the microtensile results to macrotensile properties provides insight into how process parameters affect the range of mechanical behaviors in additively-manufactured parts due to varying microstructures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Physical
Seyed Alireza Etesami, Behzad Fotovvati, Ebrahim Asadi
Summary: The study investigates the correlations between heat treatment process parameters and the microstructure and tensile properties of Ti-6Al-4V samples manufactured by laser-based powder-bed fusion additive manufacturing process. Different heat treatment conditions significantly influence the microstructure and mechanical properties of the samples.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Sergei Ivanov, Marina Gushchina, Antoni Artinov, Maxim Khomutov, Evgenii Zemlyakov
Summary: The mechanical properties of the DLD-processed Ti-6Al-4V alloy were investigated through tensile tests at different temperatures from 20°C to 800°C. It was found that the yield strength and tensile strength decrease gradually above 500°C, while the Young's modulus showed higher thermal stability compared to conventionally processed alloys. The stress relaxation processes were found to be crucial for residual stress formation at temperatures above 700°C, particularly for small-sized parts produced by the DLD method.
Article
Acoustics
Rebecca Cleary, Xuan Li, Margaret Lucas
Summary: The study examines the vibrational behavior of ultrasonic surgical devices with 3D printed metal parts. The results show that compared to traditional manufacturing methods, 3D printed devices exhibit denser modal responses and cracks under high excitation levels.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)
Article
Materials Science, Multidisciplinary
Yukyeong Lee, Eun Seong Kim, Sangeun Park, Jeong Min Park, Jae Bok Seol, Hyoung Seop Kim, Taekyung Lee, Hyokyung Sung, Jung Gi Kim
Summary: The optimal line energy density plays a crucial role in enhancing both the strength and ductility of additively manufactured Ti-6Al-4V alloy, while an excessively high energy density can negatively impact both strength and ductility. The extent of fusion and the size of prior-beta grains are important factors affecting the mechanical properties of the alloy.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Hailiang Li, Dechang Jia, Zhihua Yang, Xingqi Liao, Haize Jin, Delong Cai, Yu Zhou
Summary: Post heat treatment significantly influences the microstructure evolution and mechanical properties of SLM-fabricated Ti-6Al-4V alloy and titanium matrix composite. The TiB precipitates in the TMC samples grew into larger whiskers with improved mechanical performance after heat treatment. A finer dual-phase matrix microstructure was achieved for TMC samples with higher yield strength after heat treatment.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Ruyi Xin, Liang Lan, Chengyan Bai, Shuang Gao, Bo He, Jiang Wang
Summary: This article investigates the effects of laser shock processing (LSP) on the microstructure and fatigue performance of Ti-6Al-4V alloy. The results show that LSP treatment improves the fatigue strength of the alloy by 12.5%. Transmission electron microscopy reveals the formation of highly dense dislocations and substructures in the alloy after LSP treatment.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Coatings & Films
Z. D. Wang, G. F. Sun, Y. Lu, M. Z. Chen, H. F. Lan, K. D. Bi, Z. H. Ni
Summary: The ULMD technique overcomes the challenges of applying LMD in underwater environment through the use of special drainage nozzles and control of hydrogen content, achieving successful repair of marine equipment. This innovative technique reveals unique microstructure formation mechanisms different from in-air LMD, providing valuable guidance for future research in underwater engineering.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Yu Zhang, Xianzhe Shi, Zhiqin Du, Yahui Yang, Xiaochuan Liu, Yulong Li, Jianghua Shen
Summary: Laser ablation of titanium alloys leads to microstructure evolution and changes in mechanical properties. In addition to the ablation area, a heat-affected zone with significant changes in microstructure and mechanical characteristics exists. Needle-like alpha, refinement grains, and high oxygen content contribute to increased microhardness, while excessive oxygen content and severe solute element segregation may result in indentation cracks. These findings provide insights for the design of defensive Ti alloys and the application of laser repair techniques.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Jiankai Ma, Yashan Zhang, Junjie Li, Dingcong Cui, Zhijun Wang, Jincheng Wang
Summary: Forging-additive hybrid manufacturing technology combines the efficiency and cost advantages of traditional manufacturing with the flexibility and rapid prototyping advantages of additive manufacturing, providing an effective solution for efficient forming of large and complex components, with a focus on studying the microstructures and mechanical properties of the heat affected zone.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Haiyang Fan, Chengcheng Wang, Yujia Tian, Kun Zhou, Shoufeng Yang
Summary: This study investigated the feasibility of using L-PBF to fabricate two Ti-6Al-4V-based bimetals, Ti-6Al-4V/γ-TiAl and Ti-6Al-4V/Ti-6242, which may have great potential for the future manufacturing of aerospace components. The bimetal Ti-6Al-4V/γ-TiAl was unsuccessfully built due to the intrinsic cold cracking of γ-TiAl processed by L-PBF. In comparison, the bimetal Ti-6Al-4V/Ti-6242 was successfully manufactured by L-PBF with a solid and defect-free interface.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Optics
Dongji Cheng, Jinchao Zhang, Tuo Shi, Gang Li, Jianjun Shi, Lin Lu, Geyan Fu
Summary: ALMD technology can produce Ti-6Al-4V components with a shiny silver surface finish in a semi-opening environment, with impurity levels well below ASTM Grade 5 standards. The high cooling rate results in an acicular martensitic microstructure within beta columnar grains. Room temperature tensile tests show that as-deposited samples have higher strength and lower elongation compared to wrought materials.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
Ehsan Farabi, Thomas Klein, Martin Schnall, Sophie Primig
Summary: Cold metal transfer (CMT)-based wire-arc directed energy deposition (waDED) is a high-speed deposition process for manufacturing Ti-alloys with tailored properties. A new CMT high deposition rate strategy was found to improve microstructure and mechanical strength, reducing anisotropy.
ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Pengyuan Zou, Hua Zhang, Min Lei, Donghai Cheng
Summary: In this study, Ti-6Al-4V and PEEK-CFRTP were directly joined by laser welding. Bubbles and cracks were found in the joints, which decreased the strength. 'Anchor-shaped' structures were formed at the interface to strengthen the joints. Analysis of the microstructures revealed the phases involved in the joint formation.
