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Abstract:The current status of bulge experiments for testing mechanical properties of thin film is outlined in this article. Stressed is the status of the mechanical model and the manufacture of specimens used in the test, including their advantages and disadvantages. Moreover, the possible prospects of this test are overviewed.

Abstract:The Molecular Dynamics Method with the Finnis Sinclair many body potential is used to calculate the formation energies and combination energies of some small vacancy clusters with different configurations in TiAl. The most stable configuration of a vacancy cluster and its effect on vacancy migration nearby the cluster are simulated and discussed. The results show that, in the most stable configuration, each vacancy makes its best endeavor to form nearest neighbor relationship with the other vacancies, and there are anti site defect nearby the cluster. The atoms nearby the vacancy cluster would move towards the cluster center for bigger cluster, and it seems that there exist interstitials in the vacancy cluster. The existing vacancy cluster as the aggregation center of vacancy has the ability of trapping or absorbing the near vacancy.

Abstract:In this paper, specific emphasis has been placed on exploring the effect of electric field treatment on grain boundary strengthening for Al Li alloy 2090+Ce. The relation of the tensile properties to the electric field was investigated. The results show that the grain boundary can be so strengthened as to weaken the intergranular failure. An improvement in ductility has been obtained, however, the change of strength was very little. The research results of phenomenological theory show that the solution ability of solute atoms was enhanced and the cluster gather of solute atoms and vacancy was improved by electricfield treatment.

Abstract:利用多向大變形鍛造工業(yè)工藝和顯微組織觀察，研究了工業(yè)7075鋁合金中細(xì)晶粒顯微組織的演變。在工業(yè)生產(chǎn)條件下，7075鋁合金基體在鍛造過程中可發(fā)生完全的動態(tài)再結(jié)晶，產(chǎn)生出平均尺寸小于2μm的細(xì)小等軸再結(jié)晶晶粒結(jié)構(gòu)，晶粒內(nèi)包含高密度位錯(cuò)與彌散細(xì)小的第二相粒子纏結(jié)。鍛件經(jīng)390℃～450℃退火1h后，晶粒尺寸仍在2μm～3μm左右，這說明動態(tài)再結(jié)晶晶粒結(jié)構(gòu)在靜態(tài)退火期間是很穩(wěn)定的。

Abstract:Cu/Mo/Cu(CMC)laminate is a new kind of composite with highl electrical conductivity and thermal conductivity. Especially, the CTE(coefficient of thermal expansion) of the laminate can be tailored by changing the cladding ratio, so a significant amount of CMC sheet is used in electronic industry for substrates of integrated circuits. At present, it is an ideal material to replace the pure molybdenum sheet. In this study, CMC laminate was produced with explosive cladding technique. The interface's morphology and microstructure were observed by means of OM. SEM. Microhardness measurements revealed the feature of deformation zone.

Abstract:利用TEM技術(shù)及體視分析原理，研究2090鋁鋰合金和2090＋Ce稀土高強(qiáng)鋁鋰合金（Ce添加量為0．05％）中位錯(cuò)組態(tài)、δ'相體積分?jǐn)?shù)隨時(shí)效條件的變化，并利用微觀力學(xué)原理分析和計(jì)算δ'相的強(qiáng)化機(jī)制及強(qiáng)化貢獻(xiàn)。研究目的在于探討δ'相的強(qiáng)化作用隨時(shí)效條件的變化以及微量稀土Ce的添加對δ'相強(qiáng)化貢獻(xiàn)的影響。研究結(jié)果表明：時(shí)效初期，Ce的添加對δ'相的沉淀一定的抑制作用；理論計(jì)算結(jié)果表明，δ'相的強(qiáng)化貢獻(xiàn)約為30MPa-60MPa，2090＋Ce合金中δ'相的強(qiáng)化貢獻(xiàn)略低于同等時(shí)效條件的2090合金。

Abstract:在Co-Al-Ti三元系中，設(shè)計(jì)并熔煉了一系列含Co(Al,Ti)/(Co)的多相合金，試圖通過在脆性的B2型金屬間化合物Co(Al,Ti)中引入塑性的初級固溶體（Co）來提高材料的室溫塑性。通過對合金鑄態(tài)和經(jīng)過簡單熱處理態(tài)的分析，確定了Co(Al,Ti)/(Co)兩相區(qū)的成分范圍、相平衡和相結(jié)構(gòu)狀況；并通過室溫壓縮實(shí)驗(yàn)了解了合金的變形行為，對合金的進(jìn)一步開發(fā)前景作出了評估。

Abstract:開發(fā)了一對以AB2型Ti系多元合金為熱端合金、以AB5型稀土系多元合金為冷端合金的車用氫化物空調(diào)新型貯氫合金對。在操作溫度為200℃／40℃/20℃的條件下，合金對的理論COPc為0．41。針對汽車尾氣熱容小的特點(diǎn)，提出了熱端反應(yīng)器采用多種具有不同性能的貯氫合金組成復(fù)合氫化物床的新設(shè)想，可使汽車發(fā)動機(jī)尾氣廢熱得到充分利用。并用所研制的3對合金對組成復(fù)合氫化物床計(jì)算得出空調(diào)系統(tǒng)COPc為0．46。

Abstract:Diamond like carbon coatings with different thickness have been prepared on Ti alloy substrate by rf plasma enhanced chemical vapor deposition (rf PECVD), their surface morphology and mechanical properties were analyzed and evaluated by AFM, nanoindentation, scratch test, friction test and fretting wear test. The results show that: with the increasing of coating thickness, the surface roughness sharply increases, then significant decreases, at last tending to stable; the hardness and bond strength increase with thickness, but the friction coefficient decreases; and the friction coefficient of DLC coatings against corundum obtained by fretting test decreases with the increase of relative humidity to be below 0 1 in an aqueous condition. All of that are beneficial to their biomedical applications in body fluids.

Abstract:Three kinds of interactions between the twins and the anti phase boundaries(APBs) have been studied in massive transformation for Ti 47Al 2Nb 1Mn alloys. The results show that: the twins are usually thicker when the twins intersect with the APBs or the APBs are terminated with the twins; and the twins usually thinner when the twins are terminated with the APBs on the ends.In the late case, the twin has a wedge shape and ended at the APB with a sharp tip. Thus, we can conclude that in the course of the massive transformation there must be some close relations between the twins and the APBs which lead to the three kinds of interactions mentioned above.

Abstract:The substructure, fracture morphology and residual stress of shot peened commercial pure titanium were analyzed by the methods of TEM, SEM and XRD. The structure, stress and roughness affecting the fatigue strength were studied in this paper. The results show that twinning plays an important role in plastic deformation of hcp metals, the shot peening layer consists of twins and deformation bands, and the twin interactions can cause micro damage. Fatigue would relax the residual stresses and decrease the strengthening effect. The increased surface roughness has negative effects.

Abstract:The distortion behavior and distortion controlling processes of PIM tungsten based heavy alloys were studied in this paper. Liquid phase sintering distorts the samples due to the large difference in density between W phase and liquid phase. The two step sintering process can effectively decrease the distortion of the alloys with higher tungsten contents. For the alloy with low tungsten contents, the powder mixture can decrease the sintering temperature of the alloy for full densification with good mechanical properties.

Abstract:Powder metallurgy and hot pressed technology were adopted to manufacture the TiNb fiber reinforced TiAl matrix composites. The bending strength as well as the fracture toughness of the material were investigated. Results show that the TiNb/TiAl composite has a better property than the matrix, and the bending strength in the laboratory corresponds to the forecast of the mixture rule very well. Furthermore, the interface of the composite is consisted of full lamella structure, the matrix and fibers combine well, and the damaging ratio of the fibers is little due to the manufacture technology. It is showed that the PM technology is a good method to manufacture the TiAl matrix composite.

Abstract:考察了表面涂有ZnCl2-KCl鹽膜的純Ni和M38G，GH864兩種Ni基合金在450℃純氧氣氛中的耐蝕性。結(jié)果表明：3種材料均發(fā)生了加速性腐蝕，形成的表面產(chǎn)物膜十分疏松并與基體的粘附性較差；合金中較高的Cr含量并沒有提供良好的保護(hù)性，其腐蝕速度高于純Ni。分析了NiO與Cr2O3氧化膜在該環(huán)境中具有不同熱力學(xué)穩(wěn)定性的原因，并討論了材料的加速腐蝕機(jī)理。

Abstract:通過合金電極電化學(xué)容量與粘結(jié)劑的類型、導(dǎo)電劑的用量、電極粉末顆粒尺寸的關(guān)系，討論了制極制備工藝對儲氫合金M1(NiCoSiMnAl)5電化學(xué)性能的影響。結(jié)果表明：選擇6％－9％的PVA溶液作為粘結(jié)劑，合金電極可獲得滿意的充放電性能；采用粒度范圍較寬的合金粉制作電極，有利于增加合金粉末的填充密度，提高儲氫合金的利用率；導(dǎo)電劑用量對電極性能的影響顯著。

Abstract:用水熱法合成了具有良好結(jié)晶度和大層間距的α－磷酸鈦晶體（記為α-TiP），并用SRD，HREM，IR及TG／DSC等方法對其進(jìn)行了表征。得到的晶體形貌規(guī)整并具有較高的熱穩(wěn)定性。本實(shí)驗(yàn)對水熱法合成α－磷酸鈦的實(shí)驗(yàn)條件進(jìn)行了系統(tǒng)研究，給出了優(yōu)化的合成條件。研究表明，當(dāng)反應(yīng)體系的磷酸濃度為5M－10M時(shí)在180℃下反應(yīng)6h即可獲得良好的α－TiP晶體。

Abstract:The effects of the post heat treatment for electroplating on the adhesion of Ni or Ni/Cu coating were mainly studied in this thesis. The XRD results showed that the diffusion layer was formed between the coating and the base metal after the diffusion treatment, which was mainly consisted of solid solusion or intermetallic compound, such as Ni 3Ti, NiTi and NiTi 2 There was no direct relationship between the improvement of plating adhesion and the thickness of diffusion layer due to the formation of metallic bonds between the coating and the base metal. The metallic bonds can be easily formed and the plating adhesion can be improved when the integrality of the nonmetallic film, such as oxide film, was destroyed by the solid sulusion and metallic compound in thc diffusion layer. The microcosmic clearance between the plating layer and matrix did not increase due to the heat treatment

Abstract:The poor adhesivity between diamond coating and cemented carbide substrate due to is the big difference in properties of diamond and cemented carbides, especially in the presence of Co in the substrate, which has the deleterious effect and brings about the transformation of diamond to amorphous and graphitic carbon. How to improve the adhesivity is very important for the products development of carbides with diamond film. The adhesivity can be improved by strictly controlling the process of diamond depostion, but the surface pretreatmetn of cemented carbide substrate is another more important approach to improve the adhesivity. The main factors effecting the adhesivity are briefly introduced, and the recent advances in the research of surface pretreatment of cemented carbide substrate for diamond coating are reviewed.

Abstract:介紹了在AlN燒結(jié)中，燒結(jié)助劑的各類和加入量對AlN陶瓷材料的燒結(jié)致密度和熱傳導(dǎo)系數(shù)的影響。通過分析不同燒結(jié)助劑對AlN低溫?zé)Y(jié)（＜1600℃)的影響，認(rèn)為有效的燒結(jié)助劑應(yīng)該滿足以下4個(gè)原則：①和AlN顆粒表面Al2O3反應(yīng)生成的化合物的液化溫度應(yīng)該低于1600℃；②在燒結(jié)過程中不要誘發(fā)AlN的分解和氧化；③應(yīng)該能以晶界析出Al2O3化合物的形式降低AlN晶格中的氧；④形成的Al2O3化合物應(yīng)該有不亞于AlN的導(dǎo)熱性，或者該化合物在晶界的含量要足夠低。由于單一的燒結(jié)助劑無法同時(shí)滿足以上4個(gè)條件，Y2O3－CaO-Li2O復(fù)合燒結(jié)助劑，極有希望成為高性能的AlN低溫?zé)Y(jié)的有效助劑。