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| 1 | Macro to nanoscale deformation of transformation-induced plasticity steels:Impact of aluminum on the microstructure and deformation behavior显示文摘This work aims to elucidate the impact of aluminum-content on microstructure and deformation mechanisms of transformation-induced plasticity(TRIP) steels through macroscale and nanoscale deformation experiments combined with post-mortem electron microscopy of the deformed region.The solid-state transformation-induced mechanical deformation varied with the Al contents,and influenced tensile strength-ductility combination.Steels with 2–4 wt% Al were characterized by TRIP effect.In contrast to 2 Al-TRIP and 4 Al-TRIP steels,twinning-induced plasticity(TWIP) was also observed in conjunction with strain-induced martensite in 6 Al-TRIP steel.This behavior is attributed to the increase in stacking fault energy with the increase of Al content and stability of austenite,which depends on the local chemical variation.The study addresses the knowledge gap with regard to the effect of Al content on austenite stability in medium-Mn TRIP steels.This combination is expected to potentially enable cost-effective alloy design with high strength-high ductility condition. | V.S.Y.Injeti Z.C.Li B.Yu R.D.K.Misra Z.H.Cai H.Ding | 2018 | Journal of Materials Science & Technology2018，34，5： | 7 |
| 2 | Grain boundary and microstructure engineering of Inconel 690 cladding on stainless-steel 316L using electron-beam powder bed fusion additive manufacturing显示文摘This research explores the prospect of fabricating a face-centered cubic(fcc) Ni-base alloy cladding(Inconel 690) on an fcc Fe-base alloy(316 L stainless-steel) having improved mechanical properties and reduced sensitivity to corrosion through grain boundary and microstructure engineering concepts enabled by additive manufacturing(AM) utilizing electron-beam powder bed fusion(EPBF). The unique solidification and associated constitutional supercooling phenomena characteristic of EPBF promotes[100] textured and extended columnar grains having lower energy grain boundaries as opposed to random, high-angle grain boundaries, but no coherent {111} twin boundaries characteristic of conventional thermo-mechanically processed fcc metals and alloys, including Inconel 690 and 316 L stainless-steel.In addition to [100] textured grains, columnar grains were produced by EPBF fabrication of Inconel 690 claddings on 316 L stainless-steel substrates. Also, irregular 2–3 μm diameter, low energy subgrains were formed along with dislocation densities varying from 108 to 109 cm^2, and a homogeneous distribution of Cr_(23)C_6 precipitates. Precipitates were formed within the grains(with ~3 μm interparticle spacing),but not in the subgrain or columnar grain boundaries. These inclusive, hierarchical microstructures produced a tensile yield strength of 0.527 GPa, elongation of 21%, and Vickers microindentation hardness of 2.33 GPa for the Inconel 690 cladding in contrast to a tensile yield strength of 0.327 GPa, elongation of 53%, and Vickers microindentation hardness of 1.78 GPa, respectively for the wrought 316 L stainlesssteel substrate. Aging of both the Inconel 690 cladding and the 316 L stainless-steel substrate at 685?C for50 h precipitated Cr_(23)C_6 carbides in the Inconel 690 columnar grain boundaries, but not in the low-angle(and low energy) subgrain boundaries. In contrast, Cr_(23)C_6 carbides precipitated in the 316 L stainless-steel grain boundaries, but not in the low energy coherent {111} twin boundaries. Consequently, the Inconel690 subgrain boundaries essentially serve as surrogates for coherent twin boundaries with regard to avoiding carbide precipitation and corrosion sensitization. | I.A.Segura L.E.Murr C.A.Terrazas D.Bermudez J.Mireles V.S.V.Injeti K.Li B.Yu R.D.K.Misra R.B.Wicker | 2019 | Journal of Materials Science & Technology2019，35，2： | 5 |
| 3 | R-134a在三种不同放置方式螺旋管内凝结换热的实验研究显示文摘对替代制冷剂R - 1 34a在螺旋管内的对流凝结换热特性进行了实验研究。在制冷剂R - 1 34a的质量流量变化范围为 1 0 0~ 4 0 0kg/ (m2 s)和冷却水的平均温度分别为 1 2℃和 2 2℃的条件下 ,实验得到了在三种不同放置方式螺旋管内 (水平 ,垂直和倾斜 )R - 1 34a的对流凝结换热特性数据。实验结果表明 ,螺旋管的不同放置方式对R - 1 34a在螺旋管内的凝结换热特性具有重要的影响。通过与已有研究结果的比较 ,简要分析了螺旋管不同放置方式对R -1 | 韩吉田 B.Yu H.J.Kang C.X.Lin M.A.Ebadian | 2004 | 制冷学报2004，25，2： | 4 |
| 4 | 查看详情显示文摘 | M Cai L Qiao C Li J.Yu B.Yu | | 0，，： | 1 |
| 5 | THE REINFORCING MECHANISM OF TiB2 IN TiB2/A357 COMPOSITE显示文摘Mechanical properties were tested for in situ TiB2/A357 composite fabricated by LSM (mixed salts reaction) method. Microstructures of as cast and plastic deformed TiB2/A357 were investigated. The results show that there is a low misfit between (200)A1 and (101)TiB2 with [011]Al // [101]TiB2. There is a change from fully dendritic structure of the α-Al of A357 to a rosette-type structure of TiB2/A357. Significant increases in proof stress and Young's modulus can be obtained at low TiB2 additions. There exist dislocation loops around neighboring TiB2 particles with about 0. 1ηm in diameter and dislocation multiplication near TiB2 particles. | B.Yu Y.J.Zhang Z.X.Zhao~ F.X.Zhao: Q.K.Cai C.S.Liu | 2003 | Acta Metallurgica Sinica(English Letters)2003，16，5： | 1 |
| 6 | Adaptive wavelet thresholding for image denoising and compression显示文摘 | S.Chen B.Yu M.Vetterli | | 0，，： | 1 |
| 7 | Spatially adaptive wavelet thresholding with context modeling for image denoising显示文摘 | S.Chen B.Yu M.Vetterli | | 0，，： | 1 |
| 8 | Computational investigation of the mechanisms of particle separation and “fish‐hook” phenomenon in hydrocyclones显示文摘 | B.Wang A. B.Yu | 2010 | AIChE J2010，，7： | 1 |
| 9 | Copy number variations of the human histamine H4 receptor gene are associated with systemic lupus erythematosus显示文摘 | B.Yu Y.Shao P.Li J.Zhang Q.Zhong H.Yang X.Hu B.Chen X.Peng Q.Wu Y.Chen M.Guan J.Wan W.Zhang | 2010 | British Journal of Dermatology2010，，5： | 1 |
| 10 | 在美国和澳大利亚地区使用气候调节装置时R因子的预报显示文摘 | B.YU | 2002 | 中国水土保持2002，，7： | 0 |
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