Effect of Mg and Zn additions on the phase structure, welding behavior and mechanical properties of Al–5Gd thermal-neutron absorbing alloys
Source abstract
Abstract
To overcome the embrittlement and limited structural reliability of B 4 C/Al-based composites, Mg- and Zn-containing Al–5Gd thermal-neutron absorbing alloys were fabricated. Mg and Zn additions promoted the formation of Al 2 Gd 0.45 Mg 0.55 and Al 6.3 Gd 3 Zn 4.7 phases, respectively. The annealed Al-5Gd–5Mg alloy achieved a tensile strength of 305 MPa with 15.4% elongation, while Al-5Gd–5Zn exhibited 22.2% elongation at 149 MPa. After TIG welding, all alloys fractured in the heat-affected zone and showed reduced strength and ductility. Monte Carlo simulations confirm that both ternary alloys provide higher thermal-neutron absorption efficiency compared to 30 wt% B 4 C/Al composite. These results demonstrate that Al-Gd-Mg/Zn alloys provide a promising alloying route for lightweight neutron-shielding structural materials with improved mechanical property and weld-joint reliability.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Nuclear Physics and Applications · Advanced Welding Techniques Analysis · Metallurgical and Alloy Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (87)
Show source-provided references
1. Does nuclear energy reduce consumption-based carbon emissions: the role of environmental taxes and trade globalization in highest carbon emitting countries
2. The role of nuclear energy in the carbon neutrality goal10.1016/j.pnucene.2023.104772 ↗
3. Neutron shielding: advanced mechanisms, challenges, and material strategies10.1016/j.radphyschem.2025.113544 ↗
4. Spent nuclear fuel interim dry storage; Design requirements, most common methods, and evolution: a review10.1016/j.anucene.2021.108408 ↗
5. 18 - wet storage of spent nuclear fuel
6. Conceptual design of a mobile nuclear-electric hybrid energy storage system based on the heat pipe-cooled reactor10.1016/j.nucengdes.2024.113289 ↗
7. A comprehensive overview of additive manufacturing aluminum alloys: classifications, structures, properties and defects elimination10.1016/j.msea.2024.147464 ↗
8. A review of research on aluminum alloy materials in structural engineering
9. Research status of mechanical properties of aluminum alloy grid structure10.1016/j.istruc.2024.105967 ↗
10. Knoll · 2010
11. Influence analysis of B4C content on the neutron shielding performance of B4C/Al10.1016/j.radphyschem.2022.110684 ↗
12. Effect of the B4C content on microstructure, microhardness, corrosion, and neutron shielding properties of Al–B4C composites10.1016/j.ceramint.2022.10.071 ↗
13. The design, microstructure and tensile properties of B4C particulate reinforced 6061Al neutron absorber composites10.1016/j.jallcom.2015.01.048 ↗
14. Assessment of the microstructure and mechanical properties of B4C/6082Al composites fabricated via cyclic extrusion compression10.1016/j.jallcom.2025.182127 ↗
15. Effect of titanium element on the interfacial reactions and properties of B4C/Al composites fabricated by selective laser melting10.1016/j.matchemphys.2025.130385 ↗
16. Improving the mechanical properties of B4C/Al composites by solid-state interfacial reaction10.1016/j.jallcom.2020.154521 ↗
17. Microstructure and mechanical properties of Bp/Al neutron shielding composites
18. Effect of hot-rolling temperature and reduction ratio on tensile properties of B4C–cBN reinforced aluminum matrix composite10.1016/j.jallcom.2025.184500 ↗
19. Microstructure characteristics and properties of a novel Ni-based alloy for thermal neutron and gamma ray co-shielding10.1016/j.matchar.2024.113840 ↗
20. The design of novel neutron shielding (Gd+B4C)/6061Al composites and its properties after hot rolling10.1016/j.compositesb.2018.12.087 ↗
21. Microstructure evolution and strengthening mechanism of Gd2O3/6061Al neutron shielding composite during rolling10.1016/j.vacuum.2019.109098 ↗
22. Shielding composites for neutron and gamma-radiation with Gd2O3@W core-shell structured particles10.1016/j.matlet.2020.128082 ↗
23. Fabrication, microstructure, and mechanical properties of a novel GdB2C2/6061Al composites with outstanding thermal neutron shielding properties10.1016/j.msea.2025.149292 ↗
24. Effects of Gd addition on the hot deformation behaviors of B4Cp/Al6061 Neutron Absorber composites10.1007/s11661-023-06993-2 ↗
25. Design, fabrication and mechanical properties of a novel Al-5Cu-6Gd-10Bi alloy potentially used for shielding both thermal neutron and γ-ray10.1016/j.jallcom.2025.178670 ↗
26. Microstructure and properties controlling of Al-xGd alloys for thermal neutron absorbing10.1016/j.jnucmat.2024.155447 ↗
27. Spontaneous growth of protective oxide layer for novel Al–Gd thermal neutron absorption alloys in simulated spent nuclear fuel pool water10.1016/j.jmrt.2025.12.244 ↗
28. The effect of high solid solution Mg contents (7–13 wt%) on the dynamic strain aging behavior of Al–Mg alloys10.1016/j.msea.2023.145376 ↗
29. Strength-ductility trade-off in high-Mg aluminum alloys via Y/Gd-induced heterogeneous microstructure10.1016/j.msea.2025.149182 ↗
30. Characteristics and microstructure of newly designed Al–Zn-based alloys for the die-casting process10.1016/j.jallcom.2016.02.127 ↗
31. Mechanism of room-temperature superplasticity in ultrafine-grained Al–Zn alloys10.1016/j.actamat.2023.118671 ↗
32. A comparative investigation on weld metal properties of similar and dissimilar TIG welded joints on Al-Mg alloys10.1016/j.matpr.2022.03.373 ↗
33. Effect of vibration and interlayer metal on intermetallic formation, mechanical behavior, and tribological properties in friction stir welded al-zn-mg dissimilar joint10.1007/s00170-025-16833-9 ↗
34. Zn interlayer and tool offset effects on IMC formation and strength of AA5083/AZ91Mg joints via friction stir vibration welding10.1007/s00170-025-16624-2 ↗
35. Advancements in joining al-zn-tic-mg composites using friction stir welding process: influence of traverse speed10.1177/00219983241274502 ↗
36. Multi-pass friction stir welding of al–tic–zn–mg composite: microstructure and mechanical characteristics10.1007/s13632-024-01117-7 ↗
37. Investigations into the formation of intermetallic compounds during pinless friction stir spot welding of AA2024-Zn-pure copper dissimilar joints10.1007/s40194-022-01366-6 ↗
38. Microstructural characterization of aluminum alloys using Weck's reagent, part I: applications10.1016/j.matchar.2015.01.005 ↗
39. Computer simulation of Neutron transport—the monte carlo method
40. The Geant4 toolkit: simulation capabilities and application results10.1016/S0920-5632(03)90967-4 ↗
41. Thermodynamic evaluation and optimization of Al–Gd, Al–Tb, Al–Dy, Al–Ho and Al–Er systems using a modified quasichemical model for the liquid10.1016/j.calphad.2010.08.004 ↗
42. Thermodynamic re-assessment of the Al–Gd and Gd–Zr systems10.1016/j.tca.2014.07.014 ↗
43. Study on solid-solution interaction and existing forms of alloying elements in Mg–Al–Zn-Gd alloy10.1016/j.jallcom.2020.156209 ↗
44. Realizing high strength and ductility in extruded mg-gd-zn alloy by stacking faults and nano β precipitates replacing long-period stacking ordered phase10.1016/j.jallcom.2025.182794 ↗
45. The al–r–mg (R=Gd, Dy, Ho) systems. Part II: thermodynamic modelling of the binary and ternary systems10.1016/S0966-9795(03)00151-1 ↗
46. Stable and metastable phase equilibria in binary Mg-Gd system: a comprehensive understanding aided by CALPHAD modeling10.1016/j.jma.2019.04.006 ↗
47. Phase equilibria and solidification behavior of mg–al–gd casting alloys10.1016/S1003-6326(23)66456-8 ↗
48. Predel · 2016
49. Study on the assemblage of Y and Gd on microstructure and mechanical properties of hot extruded mg–al–zn alloy10.1016/j.msea.2015.05.008 ↗
50. Enhanced phase stability and mechanical properties of mg-al-based lightweight complex concentrated alloys10.1016/j.intermet.2025.109001 ↗
51. Relationship between solidification path, microstructure evolution and solidification cracking behavior of mg-al-ca alloy during TIG welding10.1016/j.jmst.2023.10.016 ↗
52. Exceptional grain refinement and the mechanism of columnar-to-equiaxed transition in arc welding of a cast Al-Li alloy10.1016/j.matchar.2025.115446 ↗
53. Influence of temperature cycles on the microstructures and mechanical properties of the partially melted zone in the fusion welded joints of 2219 aluminum alloy10.1016/j.msea.2014.11.047 ↗
54. Partially melted zone in aluminum welds – liquation mechanism and directional solidification
55. Microstructural evolution and its effect on mechanical properties in different regions of 2219-C10S aluminum alloy TIG-welded joint10.1016/S1003-6326(20)65407-3 ↗
56. Research progress on wire arc additive manufactured al-zn-mg-cu alloys: metallurgical defects, refining grains, enhancing mechanical properties10.1016/j.matdes.2025.114005 ↗
57. Microstructure and strengthening mechanism of TIG welded joints of a mg-nd-gd alloy: effects of heat input and pulse current10.1016/j.msea.2023.144816 ↗
58. Microstructures and mechanical properties of TIG welded Al-Mg2Si alloy joints10.1016/j.jmapro.2020.05.058 ↗
59. Study on microstructure and mechanical properties of al–mg–mn–er alloy joints welded by TIG and laser beam10.1016/j.matdes.2012.03.041 ↗
60. Weld metal solidification mechanics
61. Grain refining by ultrasonic stirring of the weld pool10.1016/j.actamat.2016.01.016 ↗
62. Nucleation mechanism and grain refining of weld metal
63. Interplay of dynamic strain aging and dynamic precipitation in the Portevin–Le Châtelier effect in an Al-Mg-Zn-based crossover aluminum alloy10.1016/j.actamat.2026.121990 ↗
64. A novel method simultaneously eliminating Portevin-Le Chatelier effect and enhancing strength in non-heat-treatable Al-Mg alloys10.1016/j.scriptamat.2024.116320 ↗
65. Portevin-Le Chatelier phenomenon study and artificial neural network approach for grain size prediction of Al-Mg automotive sheet alloys from an industrial production route
66. Influence of variation ambient system on dissimilar friction stir welding of Al alloy to Mg alloy by the addition of nanoparticles and interlayer10.1007/s12540-024-01670-4 ↗
67. Fabrication of reinforced Al–Mg composite by TiC particles via FSW: microstructure and tribology study10.1016/j.jmrt.2024.05.066 ↗
68. Eutectic aluminum alloys fabricated by additive manufacturing: a comprehensive review10.1016/j.jmst.2025.06.016 ↗
69. Enhanced load transfer and ductility in Al–9Ce alloy through heterogeneous lamellar microstructure design by cold rolling and annealing10.1016/j.msea.2021.141591 ↗
70. Hall–Petch relation and boundary strengthening10.1016/j.scriptamat.2004.06.002 ↗
71. Dislocation accumulation-induced strength-ductility synergy in TRIP-aided duplex stainless steel10.1016/j.ijplas.2024.104130 ↗
72. Meyers · 2025
73. Microstructure and flow stress of polycrystals and single crystals10.1016/S1359-6454(97)00365-0 ↗
74. Strengthening mechanisms in solid solution aluminum alloys10.1007/s11661-006-0142-7 ↗
75. Atomic Radii in crystals10.1063/1.1725697 ↗
76. Solid solution strengthening mechanism in high pressure die casting Al–Ce–Mg alloys10.1016/j.msea.2021.141109 ↗
77. Mechanical properties and strengthening mechanisms of cold sprayed Al-Mg alloys10.1016/j.msea.2025.149461 ↗
78. Effects of precipitates and solute atoms on the work hardening and softening behavior of Zn-rich aluminum alloy
79. Improvement of microstructure and strengthening mechanism in TiC particle reinforced aluminum matrix composites via copper nanocoating10.1016/j.jmrt.2025.10.004 ↗
80. Enhanced load transfer by designing mechanical interfacial bonding in carbon nanotube reinforced aluminum composites10.1016/j.carbon.2019.01.108 ↗
81. Analysis of Cu-decorated Ti particles as a reinforcement for AZ91 alloys prepared using the powder metallurgy method10.1016/j.jmrt.2024.04.196 ↗
82. Particle size effect on the interfacial properties of SiC particle-reinforced Al-Cu-Mg composites10.1016/j.msea.2017.11.068 ↗
83. Multiscale modeling of particle-induced damage in AA7075 aluminum sheet at large plastic strains10.1016/j.ijplas.2023.103741 ↗
84. Microstructure- and damage-nucleation-based crystal plasticity finite element modeling for the nucleation of multi-type voids during plastic deformation of Al alloys10.1016/j.ijplas.2023.103609 ↗
85. Strong, ductile, and hierarchical hetero-lamellar-structured alloys through microstructural inheritance and refinement10.1073/pnas.2409317121 ↗
86. Enhanced plasticity due to melt pool flow induced uniform dispersion of reinforcing particles in additively manufactured metallic composites10.1016/j.ijplas.2023.103591 ↗
87. Tensile properties of TIG welded 2219-T8 aluminum alloy joints in consideration of residual stress releasing and specimen size10.1016/j.jmrt.2022.03.059 ↗