
Deleted Journal, Год журнала: 2024, Номер unknown, С. 200166 - 200166
Опубликована: Окт. 1, 2024
Язык: Английский
Deleted Journal, Год журнала: 2024, Номер unknown, С. 200166 - 200166
Опубликована: Окт. 1, 2024
Язык: Английский
International Journal of Extreme Manufacturing, Год журнала: 2024, Номер 6(4), С. 045001 - 045001
Опубликована: Март 20, 2024
Abstract Mg-Gd-Y-Zr alloy, as a typical magnesium rare-earth (Mg-RE) is gaining popularity in the advanced equipment manufacturing fields owing to its noticeable age-hardening properties and high specific strength. However, it extremely challenging prepare wrought components with large dimensions complex shapes because of poor room-temperature processability alloy. Herein, we report wire-arc directed energy deposited (DED) Mg-10.45Gd-2.27Y-0.52Zr (wt.%, GW102K) alloy RE content presenting prominent combination strength ductility, realized by tailored nanoprecipitates through an optimized heat treatment procedure. Specifically, solution-treated sample exhibits excellent ductility elongation (EL) (14.6 ± 0.1)%, while aging-treated at 200 °C for 58 h achieves ultra-high ultimate tensile (UTS) (371 1.5) MPa. Besides, 250 16 attains good strength-ductility synergy UTS (316 2.1) MPa EL (8.5 0.1)%. Particularly, evolution mechanisms precipitation response induced various aging parameters deformation behavior caused type were also systematically revealed. The resulted from coordinating localized strains facilitated active slip activity. And should be ascribed dense nano- β ′ hampering dislocation motion. Additionally, shearable 1 contributed synergy. This work thus offers insightful understanding into manipulation performance tailoring DED preparation large-sized geometries.
Язык: Английский
Процитировано
18Virtual and Physical Prototyping, Год журнала: 2024, Номер 19(1)
Опубликована: Авг. 5, 2024
Wire arc additive manufacturing (WAAM) technology is expected to be used for the fabrication of large and complex magnesium alloy components. In this work, Mg-9.54Gd-1.82Y-0.44Zr (wt.%, GW92) thin-walled components were fabricated by cold metal transfer (CMT) in CMT-Advance mode. The microstructure WAAMed GW92 consists fine equiaxed ɑ-Mg grains with an average size ∼17 μm, eutectic phases, β" phase, cubic Zr particles. short-term high-temperature solution treatment at 525 ℃ 25 minutes significantly reduced content resulting a significant increase elongation (EL) (13.5 ± 0.3%). peak aging time solution-treated 225 12 h. WAAM-T6 sample showed strength while maintaining good ductility, yield (YS) 235 3 MPa, ultimate tensile (UTS) 360 7 10.8 1.7%. synergistic ductility properties Mg-Gd-Y-Zr alloys WAAM process impacted + treatments preserve grain high-density.
Язык: Английский
Процитировано
13Journal of Materials Research and Technology, Год журнала: 2024, Номер 29, С. 5551 - 5561
Опубликована: Март 1, 2024
With the development of aerospace, Mg-Gd-Y-Zn-Zr alloy as a high-performance light has attracted much attention. In this paper, Mg-8.8Gd-3.9Y-0.85Zn-0.45Zr (wt%, GWZ941) single-pass multilayer components fabricated by cold metal transfer wire and arc additive manufacturing (CMT-WAAM) in CMT mode, CMT-P mode CMT-Advance mode. Studying effects three characteristics on voltage current waveforms behaviors deposition processes for GWZ941 alloy. The macro morphology, defect distribution, microstructure, mechanical properties as-deposited samples were compared. deposit CMT-WAAM exhibits uniform equiaxed grain structure whose average size was 11.9 μm, 13.9 7.9 with porosity less than 0.01%. UTS EL 257 ± 4 MPa 7.5 1%, 230 8 3.5 253 2 7.0 0.3%, respectively. presence oxide particles formed CMT-WAAM, content is 0.08%, which main influencing factor reduced strength plasticity
Язык: Английский
Процитировано
12Journal of Materials Research and Technology, Год журнала: 2024, Номер 31, С. 1896 - 1911
Опубликована: Июнь 28, 2024
Mg-Gd-Y-Zn-Zr alloy is an important lightweight material in the aerospace field. Wire arc additive manufacturing (WAAM) provides a new route to fabricate large Mg components. Here, Mg-8Gd-4Y–1Zn-0.5Zr (wt.%) was fabricated using WAAM based on cold metal transfer (CMT) process. Subsequently, short-time solid solution + aging treatment designed tailor microstructure. In as-fabricated condition, microstructure mainly consisted of fine α-Mg, network (Mg,Zn)3(Gd,Y) eutectic phase, and lamellar γ′ basal precipitate. After 500 °C-1 h solution, phase rapidly dissolved, long-period stacking ordered (LPSO) formed, grain maintained. Due good deformation capacity grains kinking LPSO ductility significantly improved from 5.2 ± 0.4% 15.5 1.1%. further 200 °C-64 artificial aging, dense β′ prismatic precipitates formed. Thanks synergistic strengthening precipitates, yield strength 242 4 MPa achieved. However, inhibited, resulting drastic decrease 6.1 0.5%. Overall, combination CMT-based WAAM-processed under optimized heat regime can be superior those cast alloys with similar contents Gd Y elements. This work guide performance optimization for alloys.
Язык: Английский
Процитировано
12Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 179652 - 179652
Опубликована: Март 1, 2025
Язык: Английский
Процитировано
2Journal of Materials Research and Technology, Год журнала: 2023, Номер 27, С. 5805 - 5821
Опубликована: Ноя. 1, 2023
Wire arc additive manufacturing (WAAM) offers significant advantages in rapid of complex integral parts. In this study, Mg-Gd-Y-Zn-Zr alloy deposited walls were fabricated by cold metal transfer (CMT) based WAAM. The interface bonding relationship between the zone and substrate was studied, as well effect microstructure on mechanical properties. precipitated phase Mg24Y5 mainly distributed at grain boundary found walls, nano-scale contact diffusion formed β-Mg24Y5 α-Mg (OR: [001]β-Mg24Y5//[10 1¯ 0]α-Mg), a portion 18 R-LPSO to 14H-LPSO transition occurred zone. each layer metal, bottom had higher cooling rate than top zone, which led supersaturation rare earth elements. phases different deposition layers showed decreasing trend from due multiple thermal cycles process. Compared with cast alloy, properties (UTS, YS EL) WAAM significantly increased. ultimate tensile strength along travel direction 227.27 MPa, elongation 8.08 %.
Язык: Английский
Процитировано
19Thin-Walled Structures, Год журнала: 2024, Номер 201, С. 111980 - 111980
Опубликована: Май 7, 2024
Язык: Английский
Процитировано
7Journal of Materials Research and Technology, Год журнала: 2024, Номер 31, С. 4128 - 4138
Опубликована: Июль 1, 2024
In order to explore the forming mechanism of direct energy deposition magnesium-lithium alloy wire with high lithium content, this study introduces a novel approach utilizing Cold Metal Transfer Wire Arc Additive Manufacturing (CMT-WAAM) successfully fabricate thin-walled structures LA103Z Mg–Li alloy. A comprehensive comparison was conducted evaluate microstructure and mechanical properties different regions on CMT-WAAM samples, in addition cast rolled samples. The samples is mainly composed β-Li phase fine needle shaped α-Mg phase, exhibiting notable divergence from observed It noteworthy that along direction exhibited significant variability but no anisotropy discerned scanning directions. discrepancies across are predominantly attributed variations grain size, size proportion secondary phases, which related low heat input cooling rate process. mean tensile strength 159.5 MPa, marking respective increase 30.7% 13.9% compared These findings underscore outstanding conventionally formed This provides insights into additive manufacturing dual-phase alloys for large-scale complex structures.
Язык: Английский
Процитировано
7Journal of Alloys and Compounds, Год журнала: 2024, Номер 984, С. 173950 - 173950
Опубликована: Фев. 22, 2024
Язык: Английский
Процитировано
6International Journal of Extreme Manufacturing, Год журнала: 2024, Номер 6(4), С. 045006 - 045006
Опубликована: Май 8, 2024
Abstract Customized heat treatment is essential for enhancing the mechanical properties of additively manufactured metallic materials, especially alloys with complex phase constituents and heterogenous microstructure. However, interrelated evolutions different microstructure features make it difficult to establish optimal processes. Herein, we proposed a method customized process exploration establishment overcome this challenge such kind alloys, wire arc (WAAM) Mg-Gd-Y-Zn-Zr alloy layered heterostructure was used feasibility verification. Through method, microstructures (fine grain, controllable amount long period stacking ordered (LPSO) structure nano-scale β ′ precipitates) corresponding processes (520 °C/30 min + 200 °C/48 h) were obtained achieve good combination high strength 364 MPa considerable elongation 6.2%, which surpassed those other state-of-the-art WAAM-processed Mg alloys. Furthermore, evidenced that favorable effect undeformed LPSO structures on emphasized only when precipitates present. It believed findings promote application magnesium workpieces help materials.
Язык: Английский
Процитировано
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