张新平
个性化签名
- 姓名:张新平
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
材料科学
- 研究兴趣:
张新平,西安交通大学博士,曾在德国、澳大利亚做访问研究,现任华南理工大学机械工程学院材料科学与技术研究所教授,博士生导师。近年来主持及负责各类重要基础科学研究课题及项目30多项,其中作为负责人主持国家自然科学基金1项(2005-2007),教育部"新世纪优秀人才支持计划"项目1项(2005-2007),华南理工大学高水平大学建设重大项目1项,华南理工大学引进高层次人才科研启动项目1项,以及与澳大利亚悉尼大学的国际合作项目等。作为负责人(Chief Investigator)主持澳大利亚国家研究委员会(ARC)重大项目1项、澳大利亚国防科技研究院关键研究项目10余项、国际合作项目4项、中科院国家重点实验室研究基金1项,以及近20项工业研发项目;作为主要研究人员完成国家自然科学基金4项、教育部博士点基金1项。此外,在德国工作期间完成工程咨询项目2项,任职澳大利亚悉尼大学时完成工程咨询项目1项。近年来,已出版学术著作1部(26万字,合著),为科学文集撰写章节1章(3万字),获发明专利2项,在国内外发表学术论文100 多篇(其中国际论文约80篇),为澳大利亚国防科技研究院提交研究报告10册。论文被 SCI 和 EI 等 收录60余篇。在研究方面取得了多项创新性成果,得到了国际同行的认可;工作及学术表现主要反映在获得了洪堡基金及作为负责人获得了1项澳大利亚国家研究委员会重大基金和10余项国外重要研究资助,以及在一系列国际会议任咨询委员会委员、应邀作大会报告及担任分会场主席(近3年已有8次),并应邀在一些具有国际影响的研究机构讲学和合作交流(近5年已有10多次)。是5种国际学术杂志(Int. J. Fatigue, MSE-A, Composites-A, Composites Science & Technology, FFEMS)的常年审稿人,4种国际学术刊物及多个国际学术会议的特邀审稿人。
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1731
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0
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成果阅读
406
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成果数
8
张新平, X.P. Zhang a, b, ∗, C.H. Wang c, L. Yeb, Y.-W. Maib
Materials Science and Engineering A 406(2005)195-204,-0001,():
-1年11月30日
Crack closure behaviour has long been found to have a significant influence on fatigue crack growth and a large amount of research has been done in the past 3 decades. Whereas the majority of these research efforts focus on long cracks, relatively little is known for short fatigue cracks, in particular for microstructurally short cracks. This paper presents a quantitative characterisation of the wake closure/opening behaviour of microstructurally short fatigue cracks under cyclic loading for a structural aluminium alloy 2024-T351 using an in situ SEM fatigue testing system. The results clearly indicate that crack closure level was at a peak value at crack lengths of 100-150m. Beyond the regime of short crack growth, the crack closure stress decreases gradually with crack length, approaching asymptotically to a constant value at crack lengths of about 1.5 mm. In addition, it was found that the crack closure/opening stress intensity factor, Kcl (Kop), is nearly constant while the maximum stress intensity factor increases with crack size. Therefore, the effect of crack closure is most significant in the early stage of short fatigue crack propagation. The experimental results have also been compared with those predicted by Newman's model and a model previously developed by the authors.
Short fatigue cracks, Crack closure, Crack growth, In situ SEM fatigue
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张新平, Z.F. Wu, M.Q. Zeng, L.Z. Ouyang, X.P. Zhang, M. Zhu *
Scripta Materialia 53(2005)529-533,-0001,():
-1年11月30日
The coarsening behavior of nanosized Pb phase in both Al-10%Pb and Al-10%Pb-4.5%Cu alloys has been studied by X-ray diffraction and transmission electron microscopy analysis. The coarsening of Pb nanophase in Al-Pb alloys still follows the classical ripening theory (the LSW theory) and the addition of Cu decreases the coarsening rate of Pb nanophase.
Mechanical milling, Aluminum alloys, Coarsening
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张新平, X.P. Zhang a, *, Y.W. Shi b
Scripta Materialia 50(2004)1003-1006,-0001,():
-1年11月30日
Controlling the dissolution of the base metal in the liquid filler metal is very significant for both brazing and soldering processes, in particular for high temperature brazing. A model for quantitatively evaluating the dissolution thickness of base metal in liquid brazing filler metal is established, that produces consistent predictions with experiment.
Brazing, Dissolution, Stainless steel base metal, Nickel-based brazing filler metal
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张新平, X.-P. Zhang a, *, J.-C. Li b, C.H. Wang c, L. Ye a, Y.-W. Mai a
International Journal of Fatigue 24(2002)529-536,-0001,():
-1年11月30日
A new fatigue crack growth model was proposed to characterize short fatigue crack growth behaviour, through combining the mechanisms of both plasticity induced crack closure and fracture surface roughness induced crack closure. The results obtained using this proposed model show good agreement with the analytical predictions of Budiansky-Hutchinson's complex functionanalytical solution, and are reasonably close to the experimental data acquired by other researchers. In addition, the results of short fatigue crack growth rate versus stress intensity factor range predicted by the present model can well characterize the experimental results for a 2024-T3 structural aluminium alloy under two different constant-amplitude cyclic loads, and the predictions from the present model also show the reasonable improvement compared to Newman's plasticity induced closure model.
Short fatigue crack, Crack growth rate, Plasticity induced crack closure, Surface roughness induced crack closure, Combined model
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张新平, SEM W.-F. Li *, X.-P. Zhang
Materials Science and Engineering A318(2001)129-136,-0001,():
-1年11月30日
In-situ scanning electron microscope fatigue observations on initiation and propagation behavior of short fatigue cracks emanating from notch root of specimens were conducted for a low strength aluminum alloy. It was observed that short fatigue crack initiation was a process of acummulative slipping of surface grains near notch root and occurrence of multiple microcracks. The results also show that the early stage propagation of short fatigue crack was a process of the competition of multiple micro-cracks: one of them became a dominant propagating crack while most of them became dormant (i.e. non-propagating cracks). There was a deceleration of crack growth rate in the transition process where the dominant crack formed from the multiple microcracks.
In-situ SEM observation, Fatigue testing, Notch short crack, Initiation and propagation
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张新平, X.P. Zhang, C.H. Wang, W. Chen, L. Ye and Y.-W. Mai
Scripta mater. 44(2001)2443-2448,-0001,():
-1年11月30日
Based on the present investigation of short fatigue growth behaviour in single crystal superalloy SC16, it can be concluded that: 1) For single- crystal superalloy SC16, there does exist the so-called anomaly of short fatigue crack growth, similar to poly-crystal alloys. 2) Fatigue crack growth in single crystal alloy exhibited less deflected crack path and fairly flat fracture surfaces, as compared to poly-crystals. This implies that the dominant crack closure mechanism is plasticity induced crack closure. 3) Short fatigue crack in single crystal SC16 propagated dominantly along slip bands which was nearly perpendicular to the globe mode I loading direction or [001] crystallographic orientation.
Short crack, Single-crystal SC16, Slip bands, In-situ SEM fatigue
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张新平, X.-P. Zhanga, *, L. Yea, Y.-W. Maia, G.-F. Quanb, W. Weic
Composites: Part A 30(1999)1415-1421,-0001,():
-1年11月30日
Joining characteristics of SiC particulate reinforced aluminium metal matrix composites (Al/SiCp-MMC) were investigated by vacuum diffusion bonding process. The joining performances of the similar and dissimilar composites were studied, and the influences of SiCp volume percentage and the insert alloy layer on bonding quality and properties of the bonded joints were also estimated. The experimental results indicate that the strength of vacuum diffusion bonded joints decreases with increasing SiCp volume percentage, and obtaining satisfactory bonding quality in the diffusion bonded joints of the dissimilar Al/SiCp-MMC is much more difficult than that of the similar Al/SiCp-MMC. Moreover, the results still manifest that the diffusion bonding either for the similar or for the dissimilar Al/SiCp-MMC, the suitable insert alloy layer can improve evidently the joining quality of joints, and the strength of diffusion bonded joints corresponding to using the insert alloy layer is apparently higher than that of no insert layer. q1999 Elsevier Science Ltd. All rights reserved.
Vacuum diffusion bonding, A., Metal matrix composites (, MMCs), , B., Strength, E., Joints/, joining
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张新平, X.P. Zhang, *, G.F. Quan, W. Wei
Composites: Part A 30(1999)823-827,-0001,():
-1年11月30日
The present study has investigated the joining performance of SiC particulate reinforced aluminium metal matrix composite (Al/SiCp-MMC) by vacuum brazing process. After the joints brazed with Al-Si-Mg foil brazing filler metal at different brazing batches, both the mechanical properties and the microstructures of brazed joints were estimated. Moreover, the influence of SiCp size, SiCp volume percentage and the brazing parameters on bonding quality of the joints have also been discussed in detail. Th e results have revealed that the bonding quality either in SiCp/Al interface or in SiCp/SiCp interface belongs to weak bonding, and the results also show that under the same brazing parameters condition, the strength of brazed joints decreases along with increasing the SiCp volume percentage. In addition, the results also indicate that for a constant SiCp volume percentage the strength of brazed joints decreases when SiCp size increases. These results are very useful for the joining design of discontinuously reinforced metal matrix composites and further for the optimum design of composition of composites.
A., Metal-matrix composites (, MMCs), , E., Joints/, joining, B., Strength, Vacuum brazing
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