肖代红
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- 姓名:肖代红
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材料科学
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肖代红, 男,工学博士,副研究员,主要从事高性能轻合金(包括Al、Mg、Ti)与块体纳米晶材料,中国机械工程学会热处理分会青年委员会委员。毕业于上海交通大学材料学院,并获博士学位。主持参与完成国家“973”项目2项,国家自然科学基金项目3项,湖南省自然基金1项。在国际国内著名期刊上发表论文60余篇,其中被SCI、EI检索40篇。申请发明专利8项,其中授权4项。
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262
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成果数
7
肖代红
,-0001,():
-1年11月30日
Homogeneous and gradient Ti(C, N) coatings were synthesized using magnetron sputtering technique. The microstructure and properties of the two types of coatings were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), secondary ion mass spectroanalyzer (SIMS), nanoindentation and scratch tests and the comparisons were conducted. The results have shown that the coatings between homogenous and gradient Ti(C, N) are of δ-(NaCl) structure and show the columnar crystallites. The concentration of carbon increases and the concentration of nitrogen decreases with increasing in the thickness of the gradient Ti(C, N). The gradient Ti(C, N) coating exhibits better adhesion to substrates, while the homogeneous Ti(C, N) exhibits higher nano-hardness compared to the gradient Ti(C, N) coating, due to solution hardening. The homogeneous Ti(C, N) coated inserts behave better wear resistance in continuous turning but worse performance in interrupted cutting.
Coating, Characterization, Microstructure, Properties
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肖代红
,-0001,():
-1年11月30日
The superplastic behavior and deformation mechanism of a heat-resistant Al-Cu-Mg-Ag-Mn alloy prepared by ingot metallurgy was investigated by using optical microscopy, scanning electron microscopy and transmission electron microscopy. It is shown that the Al-Cu-Mg-Ag-Mn alloy shows good superplastic properties at temperatures higher than 450℃ and strain rates lower than 10-2 s-1. A maximum elongation-to-failure of 320% was observed at 500℃ and 5×10-4 s-1, where the corresponding strain rate sensitivity index m is 0.58 and the flow stress σ is 5.7 MPa. Microstructure studies revealed that the observed superplastic behavior resulted from severe grain elongation rather than grain boundary sliding. It is suggested that this phenomenon may provide a new concept for developing superplastic materials.
Aluminum alloys, Superplasticity, Microstructure.,
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肖代红, D.H. Xiao, J.N. Wang , D.Y. Ding, H.L. Yang
Journal of Alloys and Compounds 352 (2003) 84–88 ,-0001,():
-1年11月30日
The precipitation hardening response, microstructure and mechanical properties of three Al–Cu–Mg–Ag based alloys containing 0, 0.20 and 0.45 (wt%) Ce were investigated by transmission electron microscopy (TEM) and differential scanning calorimetry (DSC). It is shown that increasing Ce content from 0 to 0.45 wt% increased the tensile strength at all test temperatures up to 350℃. The high strength of the alloys with Ce is attributed to the high density and high thermal stability of fine Ω precipitates.
Aluminum alloys, Cerium, Mechanical properties, Microstructure
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【期刊论文】Effect of Cu content on the mechanical properties of an Al–Cu–Mg–Ag alloy
肖代红, D.H. Xiao, J.N. Wang , D.Y. Ding, S.P. Chen
Journal of Alloys and Compounds 343 (2002) 77–81,-0001,():
-1年11月30日
The effect of Cu content on precipitation hardening, elevated temperature tensile strength and microstructure of an Al–Cu–Mg–Ag alloy was investigated. By increasing Cu content from 4 to 8 wt.%, the tensile strength increased from 434 to 559 MPa at room temperature, and from 141 to 228 MPa at 300℃, with only a slight drop in elongation. The high strength of the 8Cu alloy is attributed to the high density of fine Ω and θ’ precipitates and an additional Cu-containing intermetallic compound. Addition of Cu above its solubility in Al may induce excessive strengthening both at room and high temperatures.
Metals, Casting, Scanning and transmission electron microscopy, High temperature alloys.,
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【期刊论文】Effect of rare earth Yb addition on mechanical properties of Al–5.3Cu–0.8Mg–0.6Ag alloy
肖代红, D. H. Xiao, M. Song, K. H. Chen, B. Y. Huang
Materials Science and Technology 2007 VOL.23 NO.10,-0001,():
-1年11月30日
The precipitation hardening response, microstructure and mechanical properties of three Al-5.3Cu-0.8Mg–0.6Ag based alloys containing 0, 0.15 and 0.25 wt-%Yb were investigated using optical microscopy, scanning electron microscopy, energy dispersive X-ray spectroscopy and transmission electron microscopy. It is shown that increasing Yb content from 0 to 0.25 wt-% increased the tensile strength at all test temperatures up to 300℃. The high strength of the alloys with Yb is attributed to the high density and high thermal stability of fine Ω precipitates.
Aluminium alloys, Ytterbium, Microstructure, Mechanical properties
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【期刊论文】铈对Al-Cu-Mg-Mn-Ag合金时效析出与显微组织的影响
肖代红, 陈康华, 宋旼
中国有色金属学报2007年5月第17卷第5期The Chinese Journal of Nonferrous Metals May, 2007, Vol.17, No.5,-0001,():
-1年11月30日
通过铸锭冶金及形变热处理,制备了不同铈含量的Al-Cu-Mg-Mn-Ag合金。采用金相观察、差热分析、扫描电镜及透射电镜研究了添加铈对合金的时效析出过程及显微组织的影响。结果表明:添加铈能显著细化铸态合金的晶粒,使平均晶粒尺寸由93µm减小至30µm,还可以加速挤压态合金的时效硬化过程,提高硬化水平,使最大硬度提高10%以上;此外,添加铈可缩短合金的峰时效时间,降低主要强化析出相—Ω相的析出温度,同时,也降低Ω相的直径,提高其析出体积分数及其在200~300℃时的高温热稳定性。
铝合金, 铈, 时效析出, 显微组织
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【期刊论文】Mg和Ag元素对二元Al-Cu合金时效析出的影响
肖代红, 宋旼
中国科学E辑技术科学2006, 36(11): 1283-1290/SCIENCE IN CHINA Ser. E. Technological Sciences,-0001,():
-1年11月30日
研究了微量Mg和Ag元素对二元Al-Cu合金时效析出的影响.研究表明,单独加入Mg或Ag元素没有显著地改变合金的时效析出相,但影响了析出相的形核速率和生长速率。然而,当Mg及Ag元素共存于二元Al-Cu合金时,Mg和Ag元素相互吸引强烈,在Al基体{111}面形成原子簇。这种原子簇促进了Cu原子沿基体(111)面的偏聚与非均匀形核,降低了给基体带来的晶格畸变能,从而使得Mg原子簇成为Ω相的优先形核区域,抑制了θ′相的形核。
Al-Cu合金, Ω相, θ′相, 原子簇
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