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Integrated Computational Materials Engineering for the Development and Design of high modulus Al Alloys

Journal of Beijing Institute of Technology 2023年第4期32卷 443-462页

作者： Chengpeng Xue Xinghai Yang Shuo Wang Junsheng Wang School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China

Integrated computational materials engineering(ICME)is to integrate multi-scale computational simulations and key experimental methods such as macroscopic,mesoscopic,and microscopic into the whole process of Al alloys design and development,which enables the design and development of Al alloys to upgrade from traditional empirical to the integration of compositionprocess-structure-mechanical property,thus greatly accelerating its development speed and reducing its development cost.This study combines calculation of phase diagram(CALPHAD),Finite element calculations,first principle calculations,and microstructure characterization methods to predict and regulate the formation and structure of composite precipitates from the design of highmodulus Al alloy compositions and optimize the casting process parameters to inhibit the formation of micropore defects in the casting process,and the final tensile strength of Al alloys reaches420 MPa and Young's modulus reaches more than 88 GPa,which achieves the design goal of the high strength and modulus Al alloys,and establishes a new mode of the design and development of the strength/modulus Al alloys.

关键词： integrated computational materials engineering(ICME) high modulus Al alloys

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Comparative Study on Test Performance of Two Kinds of high modulus Asphalt Concrete for the Steel Bridge Deck

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Journal of Architectural Research and Development 2021年第2期5卷 21-24页

作者： Jianlin Yuan Junjie Yang Yunnan Kunyu Expressway Development Co. Ltd.Kunming 650200Yunnan ProvinceChina Yunnan Zhongtong highway Investigation Design Co. Ltd.Kunming 650000Yunnan ProvinceChina

Along with the popularization and application of the steel bridge in China,due to the high modulus of asphalt concrete with good waterproof,anti-fatigue,anti-aging and good performance,asphalt concrete with high modulus was widely used in steel bridge deck pavement,the test and comparative study of high modulus asphalt concrete were carried out based on two types of common high modulus asphalt concrete which include the casting type asphalt concrete and epoxy resin modified asphalt concrete,aims to further explore the performance features of the steel bridge deck with high modulus asphalt concrete,and provide help on the application of this asphalt concrete on the steel bridge deck.

关键词： Steel bridge deck high modulus Asphalt concrete Test performance

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Shape memory poly(ether ether ketone)s with tunable chain stiffness,mechanical strength and high transition temperatures

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International Journal of Smart and Nano Materials 2022年第1期13卷 1-16,I0001页

作者： Shuai Yang Yang He Jinsong Leng Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin150080P.R.China

Shape memory polymers,with intrinsic enhanced strength and high thermal stability,are highly demanded in aerospace,engineering manufacturing,and spatial structures.In this paper,we develop a series of thermoplastic shape memory poly(ether ether ketone)s(PEEKs)for the first time,achieving an excellent shape memory ability,high strength,and great thermal stability via a condensation polymerization.Through tuning the proportion of different bisphenol monomers,the flexibility of molecular main chains is adjusted,resulting in the regulation of transition temperature and mechanical performances.Synthesized PEEKs possess the tunable T_(g) from 143.3°C to 178.6°C,the enhanced tensile strength from 48.4 to 65.1 MPa,and Young’s modulus from 0.45 to 1.8 GPa,in addition to the excellent heat-triggered shape memory effect,as indicated by high recovery ratio(94%–98.9%)and fixity ratio(over 99.5%).Furthermore,after incorporating the magnetocaloric Fe_(3)O_(4) particles,the composites exhibit remotely noncontact magnetic-triggered shape memory behaviors(Fe_(3)O_(4) content over 10 wt%).These synthesized T_(g) tunable shape memory PEEKs and the composites have wide utilization potential in fields of engineering and aerospace structures,owing to the excellent mechanical properties,thermal stability,unique programmable deformation ability,and remote actuation.

关键词： Shape memory PEEK tunable transition temperature high modulus magnetic actuation

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