The Heat Treatment Influence on the Microstructure and Hardness of TC4 Titanium Alloy Manufactured via Selective Laser Melting

Zhao, Zhanyong; Li, Liang; Bai, Peikang; Yang, Jin; Wu, Liyun; Li, Jing; Guan, Renguo; Qu, Hongqiao

doi:10.3390/ma11081318

Cited by 75 publications

(41 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the increase in joining temperature could give rise to the grain growth of TC4, resulting in hardness decrease, it was clarified that the microhardness of TC4 gradually decreased with temperature only when it was lower than the phase transformation temperature of 882 °C . Instead, microhardness increased with annealing temperature when it was higher than 882 °C due to the martensite transformation of β ‐Ti . Thus, the brazing temperature of 980 °C with Cu‐50TiH 2 filler may lead to a slight increase in the microhardness of the TC4 alloy.…”

Section: Resultsmentioning

confidence: 99%

Joining of Graphite to Ti6Al4V Alloy Using Cu‐Based Fillers

Duan

Mao

et al. 2019

Adv Eng Mater

View full text Add to dashboard Cite

Joining of graphite to Ti6Al4V (TC4) alloy is achieved with three Cu-based fillers (Cu-22TiH 2 , Cu-50TiH 2 , and Cu-30TiH 2 -5Ni). Microstructural characterizations reveal that a thin TiC layer and a diffusion layer containing Ti solid solution (Ti(ss)) with Ti 2 Cu are developed at the graphite/filler layer and filler layer/TC4 interfaces, respectively. For the joint obtained with Cu-22TiH 2 filler, the filler layer consists of TiCu and Ti 2 Cu, whereas it is composed of Ti 2 Cu, TiCu, and Ti(ss) for the joint with Cu-50TiH 2 filler. In the case of the joint with Cu-30TiH 2 -5Ni filler, the filler layer mainly contains Ti(Cu,Ni) and Ti 2 (Cu,Ni). The microhardness of the interfacial area in the joints is highly related to the microstructure of joints. The filler layer of the joint with Cu-50TiH 2 filler exhibits higher microhardness than those with Cu-22TiH 2 and Cu-30TiH 2 -5Ni fillers, owing to the high content of Ti 2 Cu phase with relatively high microhardness and the increase in hardness of Ti-Cu intermetallics at higher brazing temperatures. The high shear strength of joints reveals favorable bonding of Cu-based fillers with substrates.

show abstract

Section: Resultsmentioning

confidence: 99%

Joining of Graphite to Ti6Al4V Alloy Using Cu‐Based Fillers

Duan

Mao

et al. 2019

Adv Eng Mater

View full text Add to dashboard Cite

show abstract

“…Due to the extension of the deposition plane and to the heating caused by the layers overlapping, cooling condition are not so severe to led to a martensitic microstructure. Unlike EB-PBF, L-PBF gives rise to more severe cooling and consequently to the formation of the α martensite [53]. hardening of titanium by quenching is only moderate.…”

Section: Metallographic Investigationmentioning

confidence: 99%

Tensile and Creep Properties Improvement of Ti-6Al-4V Alloy Specimens Produced by Electron Beam Powder Bed Fusion Additive Manufacturing

Aliprandi

Giudice

Guglielmino

et al. 2019

Metals

View full text Add to dashboard Cite

Thanks to their excellent mechanical strength in combination with low density, high melting point, and good resistance to corrosion, titanium alloys are very useful in many industrial and biomedical fields. The new additive manufacturing methods, such as Electron Beam Powder Bed Fusion based on the deposition of metal powders layers progressively molten by electron beam scanning, can overcome many of the machining problems concerning the production of peculiar shapes made of Ti alloys. However, the processing route is strictly determinant for mechanical performance of products, especially in the case of Ti alloys. In the present work flat specimens made of Ti-6Al-4V alloy produced by Electron Beam Powder Bed Fusion (or Electron Beam Melting) have been built and post-processed with the purpose of obtaining good tensile and creep performance. Preliminarily, the process parameters were set according to literature evidence and machine producer recommendations, validated by the results of a thermal analysis, aimed at satisfying the best processing conditions to reduce defects, as unmelted regions, microstructure coarsening or porosity, that are detrimental to mechanical behavior. Subsequently, Hot Isostatic Pressing and surface smoothing were considered, respectively, in order to reduce any internal porosity and lower roughness. Microstructure of the investigated specimens was characterized by optical and scanning electron microscopy observations and by X-ray diffraction measurements. Results show enhanced tensile behavior after the hot pressing treatment that allows to relieve stresses and reduce defects detrimental to mechanical properties. The best ductility was obtained by the combined effects of machining and densification. Creep test results verify the beneficial effects of surface smoothing.

show abstract

“…The demand for Titanium alloy (Ti6Al4V) dominates in various fields including aerospace, marine, automobile, chemical, and biomedical industries [1][2][3][4][5][6]. This widespread use of Grade 5 Ti6Al4V is as it possesses high specific strength, high fracture toughness, ductility, excellent corrosion, and fatigue resistance, high-level biocompatibility, good damage tolerance, workability, etc.…”

Section: Introductionmentioning

confidence: 99%

“…After heat treatment, the alloy achieve superior tensile thermo-mechanical behavior. Several authors [6,[20][21][22][23][24] discussed the effect of various heat-treatment procedures on the microstructure, hardness and tensile properties of Ti6Al4V. Gao et al [25] concluded that the annealing treatment decreases the fatigue life of Ti6Al4V.…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Very High Cycle Fatigue (VHCF) Behavior of Ti6Al4V—A Comparative Study

et al. 2020

View full text Add to dashboard Cite

In this study, an investigation is carried out to evaluate and compare the material and physical properties of Grade 5 Titanium alloy (Ti6Al4V G5) samples of three different impeller manufacturers. The study aims to identify the efficient impeller core material from different Ti6Al4V G5 manufacturers. Ultrasonic fatigue test for Ti6Al4V samples of 100 horsepower (hp) centrifugal compressor impeller parts is performed before and after heat treatment. The effect of microstructure on Very High Cycle Fatigue (VHCF) behavior of Ti6Al4V is also analyzed and discussed in detail. Optical Microscopy (OM) and Scanning Electron Microscopy (SEM) observation are carried out to investigate the microstructure of different Ti6Al4V material samples. The dynamic elastic properties are measured by the Impulse Excitation Technique (IET) at room temperature. The fracture behavior of the tensile specimens is analyzed by SEM. Post-heat-treatment analysis of Ti6Al4V is also carried out and presented which affects the grain size of the material sample and thus considerable effect in the mechanical properties. Chemical composition investigation of Ti6Al4V using SEM and Energy Dispersive X-ray Spectroscopy (EDS) also included in this study.

show abstract

The Heat Treatment Influence on the Microstructure and Hardness of TC4 Titanium Alloy Manufactured via Selective Laser Melting

Cited by 75 publications

References 36 publications

Joining of Graphite to Ti6Al4V Alloy Using Cu‐Based Fillers

Joining of Graphite to Ti6Al4V Alloy Using Cu‐Based Fillers

Tensile and Creep Properties Improvement of Ti-6Al-4V Alloy Specimens Produced by Electron Beam Powder Bed Fusion Additive Manufacturing

Microstructural and Very High Cycle Fatigue (VHCF) Behavior of Ti6Al4V—A Comparative Study

Contact Info

Product

Resources

About