Simultaneous improvement of strength and elongation of laser melting deposited Ti-6Al-4V titanium alloy through three-stage heat treatment

Zhang, Yu; Wang, Ke; Sun, Zhonggang; Xin, Renlong

doi:10.1016/j.jmatprotec.2022.117607

Cited by 31 publications

(7 citation statements)

References 39 publications

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“…The following AC process suppresses the further growth of the α-laths, which results in the formation of small equiaxed α p . At the aging heat treatment of at 500 °C-600 °C for 4h, substantial dispersed ultrafine α precipitates (nano-scale α s ) in the β phase [6]. Finally, the multiscale-α microstructure with coarse α p , equiaxed α p and ultrafine nano-scale α s is obtained through the STA approach.…”

Section: Resultsmentioning

confidence: 99%

“…In the design of STA process parameters, the β transus temperature (T β ) of Ti6Al4V4Ta alloy was calculated by the Thermo-Calc software to be 974 °C, as presented in figure 2(a). In order to inhibit the growth of grains, the solution temperature is generally selected at 30-50 °C below T β [6,13]. Therefore, the solution treatment for deposited Ti6Al4V4Ta samples was carried out at 930 °C for 1 h, then cooled in the air.…”

Section: Methodsmentioning

confidence: 99%

“…Ti6Al4V alloy is traditionally manufactured by forging and machining techniques, often suffering material underutilization and long lead time, which hinders their broader applications [3]. As a new manufacturing method, laser directed energy deposition (LDED) can achieve near-net-shaped fast fabricating and high material utilization [4,5]; however, the rapid heating and cooling rates during the LDED process can introduce high levels of thermal stresses and undesired microstructures, making it difficult to have high strength while maintaining good ductility [6,7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Balance of strength and ductility for laser directed energy deposited Ta-containing Ti6Al4V via solution and aging treatment

Shang,

Hou,

Zhang

et al. 2024

Mater. Res. Express

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The tensile properties of laser directed energy deposited (LDEDed) titanium (Ti) alloys are usually characterized by high strength and low ductility, which seriously limits their wide application prospects. In this study, a novel Ti6Al4V4Ta alloy is prepared using LDED technique and achieved excellent strength (UTS ~ 990 MPa) and ductility (elongation ~ 16 %) through solution treatment at 930 ℃ and aging at 550 ℃. The high strength is mainly attributed to the ultraﬁne micron-scale αs while the good ductility results from equiaxed αp, the increased β phase and weakened α-variant selection. The combination of appropriate elemental alloying and heat treatments could provide some guidance for LDED Ti alloys of good mechanical performance with potentials for wider applications.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Balance of strength and ductility for laser directed energy deposited Ta-containing Ti6Al4V via solution and aging treatment

Shang,

Hou,

Zhang

et al. 2024

Mater. Res. Express

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show abstract

“…As shown in Figure 16 c,d, the primary α phase is mainly an ellipse, an intermittent equiaxed structure. The shape of the secondary α phase is fine and needle-like, and the distribution is longitudinal and transverse, resembling a basketweave structure with a length dimension of about 10 μm [ 24 ]. As shown in Figure 16 e,f, the primary α phase is mainly a spherical equiaxed structure, and the secondary α phase is a long needle-like structure with a length of about 20~30 μm.…”

Section: Heat Treatment and Testingmentioning

confidence: 99%

“…Cheng et al [ 23 ] studied the effects of heat treatment on the mechanical properties of a novel high-temperature titanium alloy (Ti55). Yu et al [ 24 ] investigated a three-stage heat treatment method for Ti6Al4V alloy and revealed the effects of microstructure on strength and ductility. Wang et al [ 25 ] investigated the formation and characteristics of bilamellar microstructure in Ti6242S titanium alloy under a dual heat treatment (single-phase heat treatment + two-phase heat treatment).…”

Section: Introductionmentioning

confidence: 99%

Forming Analysis and Heat Treatment of TC31 Titanium Alloy Component with High Ribs and Thin Webs

Deng

Wang

et al. 2023

Materials

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TC31 is a new type of high-temperature titanium alloy, but few researchers have studied the combination of forming and heat treatment of a component using this material. The component with high ribs and thin webs was studied by numerical simulation and trail production. Based on the establishment of the finite element model, the forming process was analyzed by simulation software, and the maximum forming load of the component was 1920 kN. Ultimately, there were no folding defects of the component during the forming process. The material flow law was revealed by selecting the typical section of the component, and then the forming process was verified and the fully filled component was obtained. After that, the component was subjected to post-processing, and three heat treatment methods were designed to conduct heat treatment experiments on it (heat treatment: solution treatment and aging treatment). By analyzing the influence of three heat treatment methods on mechanical properties, the optimal heat treatment method was obtained, namely a solution treatment at 960 °C for 2.5 h and aging treatment at 610 °C for 7 h. The ultimate tensile strength, yield strength, elongation, and section shrinkage of the component through forging forming and heat treatment are higher than those of original material; meanwhile, it also indicates that the designed heat treatment has a better effect on the high-temperature mechanical properties of this titanium alloy at 650 °C than that at 450 °C. The research on the combination of the forming and heat treatment of this component provides a reference for the engineering application of high-temperature titanium alloys.

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Analysis on the technology, microstructure, and mechanical properties of Ti-6Al-4 V alloy narrow gap oscillation laser welding with multi-stranded wire

Wang

Fang

et al. 2023

Int J Adv Manuf Technol

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Simultaneous improvement of strength and elongation of laser melting deposited Ti-6Al-4V titanium alloy through three-stage heat treatment

Cited by 31 publications

References 39 publications

Balance of strength and ductility for laser directed energy deposited Ta-containing Ti6Al4V via solution and aging treatment

Balance of strength and ductility for laser directed energy deposited Ta-containing Ti6Al4V via solution and aging treatment

Forming Analysis and Heat Treatment of TC31 Titanium Alloy Component with High Ribs and Thin Webs

Analysis on the technology, microstructure, and mechanical properties of Ti-6Al-4 V alloy narrow gap oscillation laser welding with multi-stranded wire

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