The influence of hydrogenation on microstructure and tensile properties of Ti40 alloy has been investigated.The microstructure observation reveals that a new phase called η phase with FCC structure appears at the grainboundaries when the hydrogen content above 0.3 wt.％.With increasing hydrogen contents,the strength first increases and then decreases,and the ductility decreases as the specimens tensioned at both room temperature and 700℃.These phenomenons are resulted from the solution strengthening of hydrogen addition in Ti40 alloy with single β phase.As the hydrogen content increases,the fracture mode changes from dimple to cleavage fracture for specimens tensioned at room temperature.When tested at 700℃,the morphology of fracture surfaces in the specimens are all characterized by polygonal grains and the fractograph exhibits typically "sugar candy" brittle fracture for the specimen with 0.5wt％ H

关键词：钛合金;加氢;显微组织演变;拉伸性能

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We use x-ray spectroscopy and density functional theory to investigate the hydrogenation-induced electronic structure changes in graphene on Pt(111). The atom-specific properties of the spectroscopy allow for a direct projection of the band structure onto the carbon atoms; this was compared with the calculated density of states. Instead of the generally expected band opening behavior, we observe states at the Fermi level in the carbon-projected density of states. Hydrogenation is accompanied by pinning of the graphene to the substrate through the formation of local CPt bonds which cause the graphene layer to become metallic upon hydrogenation.

关键词：石墨烯;加氢;原子;碳;密度

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A synopsis of these studies follows, and, in a separate section, abstracts of published and submitted papers are provided. One of the goals of this research is to learn more about fundamental processes involving photoinduced electron transfer to adsorbates on metals, in particular, those that lead to dissociation of water. Silver nanoparticles are chosen to represent the low end of catalytic activity, so as to delineate effects most directly associated with the dissociative electron transfer step. However, we also worked on palladium nanoparticles to take advantage of increased reactivity of that metal and its potential for hydrogen storage. In collaborative work with experimental investigations, the palladium catalyzed decomposition of butanoic acid was treated using high level electronic structure theory. For photoinduced processes at surfaces, key questions involve how electron transfer excited states are stabilized by the image charge or hole in the metal and whether dissociation occurs on the excited electronic state surface or by crossing over at some adsorbate geometry to the ground state surface. Differentiating between competing pathways depends on energy barriers and lifetimes in excited states.

关键词：表面；化学反应；金属；催化剂；储氢

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The synthesis of composite Pd membranes has been modified by the addition of a Al(OH)3 graded layer and sequential annealing at high temperatures to obtain membranes with high permeance and outstanding selectivity stability for over 4000 hours at 450DGC. Most of the membranes achieved in this work showed H2 flux well above 2010 DOE targets and in some case, also above 2015 DOE targets. Similar composite membranes were tested in water gas shift reaction atmospheres and showed to be stable with high CO conversion and high hydrogen recovery for over 1000 hours. The H2 permeance of composite Pd-Au membranes was studied as well as its resistance in H2S containing atmospheres. H2S poisoning of Pd-based membranes was reduced by the addition of Au and the loss undergone by membranes was found to be almost totally recoverable with 10-30 wtAu. PSA technique was studied to test the possibility of H2S and COS removal from feed stream with limited success since the removal of H2S also led to the removal of a large fraction of the CO2. The economics of a WGS bundle reactor, using the information of the membranes fabricated under this project and integrated into an IGCC plant were studied based on a 2D reactor modeling. The calculations showed that without a government incentive to impose a CO2 tax, application of WGS membrane reactors in IGCC would be not as economically attractive as regular pulverized coal plants.

关键词：复合材料;膜;制氢;退火;煤气化

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Forging is a process in which metals are shaped into desired designs by applying compressive forces. This technique is very robust compared to a number of other metal shaping techniques because of the strength acquired by the metal during forging. Some metals are processed hot while others are processed cold. There are a number of forging methods such as closed die, press, and upset forging; open die forging; cold forging; and closed die forging for non-ferrous metals. The Automotive industry is the major end-user of forged products followed by Engineering Machinery and Railway industries.

关键词：锻造；金属；压缩；所需图案；金属成形技术

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HSS metal-cutting tools are used for the development of products with increased/desired dimensional accuracy. The different grades of HSS metal-cutting tools are T1, T4, T6, M2, M4, M15, and M42. HSS metal-cutting tools are used for several applications such as milling, tapping, drilling, counter-boring, gear cutting, reaming, and broaching. These cutting tools are adopted across various industries including Automotive, Industrial Machinery, Aerospace and Defense,Shipbuilding, and Electrical and Electronics.

关键词：高速钢切削刀具；产品；开发；增加；尺寸精度

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2013年1-11月，全国规模以上工业增加值继续保持增长态势，增加值同比增长9.7%.比2012年同期回落0.3个百分点，比2011年同期回落4.3个百分点。预计2013年全年累计同比增长率难以超过10%。分行业来看，黑色金属冶炼及压延加工业呈现下滑趋势，金属制品业、通用设备制造业、专用设备制造业保持稳定增长，汽车制造业增长幅度扩大。

关键词：钢铁；机械工业；运营

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Sound amalgams can be fabricated by substituting Ga-In liquid for mercury; Cu-coated steel fibers bond well with the amalgam components. Inclusion of steel fibers significantly improved mechanical properties. An application scenario utilizing amalgams for in-space parts fabrication and repair was suggested. Procedure and materials need to be optimized.

关键词：钢铁；汞中毒；汞；金属纤维；机械性能

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This report contains the analysis and retrofit of a steel truss bridge on KY 974 over Howard Creek in Clark County, Kentucky. The bridge had major corrosion and damage to the steel stringers, along with cracking and leaching occurring in the concrete bridge deck.

关键词：钢铁；铝桥面板；裂化；腐蚀；配置

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由于国家“稳中求进”的经济方针，随着新型城镇化的稳步推进，国家在基础设施建设、绿色能源方面的投资将加大，建筑、汽车、家电等行业对钢材的需求将保持一定的增长，钢管市场与其他钢材市场相比，市场需求仍保持增长势头，预计2014年钢管市场需求同比增长约3%，出口增长约5%。

关键词：钢管；需求

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