J
Jiajun Xu
Researcher at University of the District of Columbia
Publications - 126
Citations - 1522
Jiajun Xu is an academic researcher from University of the District of Columbia. The author has contributed to research in topics: Welding & Engineering. The author has an hindex of 16, co-authored 88 publications receiving 1051 citations. Previous affiliations of Jiajun Xu include National University of Singapore & University of Maryland, College Park.
Papers
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Journal ArticleDOI
Highly Thermally Conductive Papers with Percolative Layered Boron Nitride Nanosheets
Hongli Zhu,Yuanyuan Li,Zhiqiang Fang,Jiajun Xu,Fangyu Cao,Jiayu Wan,Colin Preston,Bao Yang,Liangbing Hu +8 more
TL;DR: A dielectric nanocomposite paper with layered boron nitride (BN) nanosheets wired by one-dimensional (1D) nanofibrillated cellulose (NFC) that has superior thermal and mechanical properties is reported.
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Effect of nanoparticle clustering on the effective thermal conductivity of concentrated silica colloids
Chunwei Wu,Tae Joon Cho,Jiajun Xu,Donggeun Lee,Bao Yang,Michael R. Zachariah,Michael R. Zachariah +6 more
TL;DR: The present experiment showed that clustering did not show any discernable enhancement in the thermal conductivity even at high volume loading, and recommended the need for higher thermal Conductivity and optimized fractal dimension of particles for maximizing the clustering effect.
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Keyhole-induced porosity formation during laser welding
TL;DR: In this paper, the porosity of glass samples was characterized qualitatively and quantitatively by combining super depth microscope and image processing, showing that the higher the energy density the more violent the bubble merging and giving rise to an increased possibility to form large pores.
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Numerical simulation and experiment analysis of angular distortion and residual stress in hybrid laser-magnetic welding
TL;DR: Hybrid laser-magnetic welding 316L steel with butt joint was investigated in this paper, where the bottom width of the bead profile was broadened from 1.606mm to 2.492mm, grain size was homogenized, and austenitic content was also improved.
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Review on finite element analysis of welding deformation and residual stress
TL;DR: In this paper, the influence of welding process, constraints, solid phase transformation and multi-pass welding on deformation and residual stress was discussed, and computation accuracy and efficiency were summarised.