Zhongji Sun
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View article: Ultra-strong lightweight TiAlVSc multi-principal element alloys for elevated temperature applications
Ultra-strong lightweight TiAlVSc multi-principal element alloys for elevated temperature applications Open
View article: Additively Manufactured Sustainable 8xxx-series Aluminum and an In-situ TEM Observation
Additively Manufactured Sustainable 8xxx-series Aluminum and an In-situ TEM Observation Open
View article: Enhancing Sustainability in Metal Additive Manufacturing Through Recycling Elemental Fe, Co, and Ni Powders and Subsequent Plasma Atomization
Enhancing Sustainability in Metal Additive Manufacturing Through Recycling Elemental Fe, Co, and Ni Powders and Subsequent Plasma Atomization Open
View article: Mitigating Strain Localization via Stabilized Phase Boundaries for Strengthening Multi‐Principal Element Alloys
Mitigating Strain Localization via Stabilized Phase Boundaries for Strengthening Multi‐Principal Element Alloys Open
Multi‐principal element alloys (MPEA) demonstrate exceptional stability during rapid solidification, making them ideal candidates for additive manufacturing and other high‐design‐flexibility techniques. Unexpectedly, MPEA failure often mim…
View article: Innovative alloy design via knowledge-informed graph attention networks for laser additive manufacturing
Innovative alloy design via knowledge-informed graph attention networks for laser additive manufacturing Open
View article: Introduction to structure–property relationships in alloys
Introduction to structure–property relationships in alloys Open
Xiaoxiang Wu, Seok Su Sohn, Zhongji Sun and Qingqing Ding introduce the Materials Advances themed collection on structure–property relationships in alloys.
View article: Revealing the underlying mechanism in controlling Young’s modulus of additively manufactured Ti-6Al-4V using fuzzified machine learning
Revealing the underlying mechanism in controlling Young’s modulus of additively manufactured Ti-6Al-4V using fuzzified machine learning Open
Metal products fabricated by additive manufacturing (AM), face challenges in mechanical property evaluation due to the complex thermal history of the process. This study used Ti-6Al-4V alloy, widely used in AM to examine the applicability …
View article: In-situ heating TEM observation of solidification cell evolutions in an Al-Fe alloy built by laser-powder bed fusion
In-situ heating TEM observation of solidification cell evolutions in an Al-Fe alloy built by laser-powder bed fusion Open
Cellular structures (i.e., solidification cells) are a unique feature within alloys fabricated through rapid solidification, such as laser-powder bed fusion (L-PBF). Ever since the report of these structures’ beneficial effects on the mate…
View article: Near-theoretical strength and deformation stabilization achieved via grain boundary segregation and nano-clustering of solutes
Near-theoretical strength and deformation stabilization achieved via grain boundary segregation and nano-clustering of solutes Open
Grain boundary hardening and precipitation hardening are important mechanisms for enhancing the strength of metals. Here, we show that these two effects can be amplified simultaneously in nanocrystalline compositionally complex alloys (CCA…
View article: Laser-based directed energy deposition of Monel K-500 and Stellite 6 multi-materials
Laser-based directed energy deposition of Monel K-500 and Stellite 6 multi-materials Open
Laser-based directed energy deposition (L-DED) offers significant advantages for repairing metal structures, particularly in the marine and offshore industry where corrosion-resistant materials like Monel K-500 (a Ni-Cu alloy) lack strengt…
View article: Thermodynamics‐Guided High‐Throughput Discovery of Eutectic High‐Entropy Alloys for Rapid Solidification
Thermodynamics‐Guided High‐Throughput Discovery of Eutectic High‐Entropy Alloys for Rapid Solidification Open
Excellent castability, significantly refined microstructure, and good mechanical properties make eutectic high‐entropy alloys (EHEAs) a natural fit for rapid solidification processes, e.g., additive manufacturing. Previous investigations h…
View article: Crack mitigation in additively manufactured AlCrFe2Ni2 high-entropy alloys through engineering phase transformation pathway
Crack mitigation in additively manufactured AlCrFe2Ni2 high-entropy alloys through engineering phase transformation pathway Open
The far-from-equilibrium solidification during additive manufacturing often creates large residual stresses that induce solid-state cracking. Here we present a strategy to suppress solid-state cracking in an additively manufactured AlCrFe …
View article: Laser powder bed fusion of 316L stainless steel and K220 copper multi-material
Laser powder bed fusion of 316L stainless steel and K220 copper multi-material Open
Multi-material additive manufacturing holds immense potential for performance and functionality enhancement. Past research efforts primarily focused on the horizontal interface (perpendicular to the sample build direction) during the laser…
View article: Effects of carbon content on precipitate evolution and crack susceptibility in additively manufactured IN738LC
Effects of carbon content on precipitate evolution and crack susceptibility in additively manufactured IN738LC Open
Hot cracking is a major bottleneck preventing the additive manufacturing community from adopting precipitation-strengthened nickel-base superalloys, such as the IN738LC. Prior literature demonstrates the beneficial outcome of increasing th…
View article: Revealing the Mechanism of the Extraordinary Ductility in the 75w-25cu Composite at Elevated Temperatures
Revealing the Mechanism of the Extraordinary Ductility in the 75w-25cu Composite at Elevated Temperatures Open
View article: A large-volume 3D EBSD study on additively manufactured 316L stainless steel
A large-volume 3D EBSD study on additively manufactured 316L stainless steel Open
Most microstructure characterization tools are based on the observation of two-dimensional (2D) sections through a material. The results allow, for microstructures with homogeneous and often equiaxed grain shapes, a sufficiently good inter…
View article: Microstructure of a spark-plasma-sintered Fe2VAl-type Heusler alloy for thermoelectric application
Microstructure of a spark-plasma-sintered Fe2VAl-type Heusler alloy for thermoelectric application Open
The influence of microstructure on thermoelectricity is increasingly recognized. Approaches for microstructural engineering can hence be exploited to enhance thermoelectric performance, particularly through manipulating crystalline defects…
View article: Green laser powder bed fusion based fabrication and rate-dependent mechanical properties of copper lattices
Green laser powder bed fusion based fabrication and rate-dependent mechanical properties of copper lattices Open
Additive manufacturing of pure copper (Cu) via laser-powder bed fusion (L-PBF) is challenging due to the low energy absorptivity under infra-red laser. As a result, 3-dimensional architectures, known for excellent load-bearing and energy a…
View article: Green laser powder bed fusion based fabrication and rate-dependent mechanical properties of copper lattices
Green laser powder bed fusion based fabrication and rate-dependent mechanical properties of copper lattices Open
Lattice structures composed of periodic solid frames and pores can be utilized in energy absorption applications due to their high specific strength and large deformation. However, these structures typically suffer from post-yield softenin…
View article: Thermodynamics-guided alloy and process design for additive manufacturing
Thermodynamics-guided alloy and process design for additive manufacturing Open
In conventional processing, metals go through multiple manufacturing steps including casting, plastic deformation, and heat treatment to achieve the desired property. In additive manufacturing (AM) the same target must be reached in one fa…
View article: Reducing hot tearing by grain boundary segregation engineering in additive manufacturing: example of an AlxCoCrFeNi high-entropy alloy
Reducing hot tearing by grain boundary segregation engineering in additive manufacturing: example of an AlxCoCrFeNi high-entropy alloy Open
View article: Revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting
Revealing hot tearing mechanism for an additively manufactured high-entropy alloy via selective laser melting Open
View article: Additive manufacturing of NiTi shape memory alloys using pre-mixed powders
Additive manufacturing of NiTi shape memory alloys using pre-mixed powders Open
View article: Additive manufacturing of austenitic alloys with high strength and high ductility by selective laser melting
Additive manufacturing of austenitic alloys with high strength and high ductility by selective laser melting Open
Selective laser melting (SLM) is a popular powder bed fusion technique used for manufacturing of metal parts. Due to its high-energy laser heat source, SLM process creates a high thermal gradient and fast cooling rate. As a result, it tend…
View article: Simultaneously enhanced strength and ductility for 3D-printed stainless steel 316L by selective laser melting
Simultaneously enhanced strength and ductility for 3D-printed stainless steel 316L by selective laser melting Open
View article: Effects Of Chamber Oxygen Concentration On The Microstructure And Mechanical Properties Of Selective Laser Melting Built Stainless Steel 316L
Effects Of Chamber Oxygen Concentration On The Microstructure And Mechanical Properties Of Selective Laser Melting Built Stainless Steel 316L Open
Selective laser melting (SLM) is a disruptive additive manufacturing technology that
\nmakes metal parts directly from 3D models in an automate layer-wise manner. Numerous studies
\nhave been carried out to examine the effects of various f…
View article: Selective laser melting of stainless steel 316L with low porosity and high build rates
Selective laser melting of stainless steel 316L with low porosity and high build rates Open