【正文】 s recognized difficulttomachine materials, but the use of super plastic forming / diffusion bonding process (SPF / DB) can be produced by welding, riveting processes difficult to produce plex titanium aircraft parts and ponents to enable integration, light weight, and lower the cost.Use of materials under thermal cycle repeated phasechange role in the effects of pressure welding material so that the contact took place in super plastic flow, so that the surface in close contact and close to the interatomic forces to achieve the scope of , the realization of the material on both sides of the interface connected to a reliable welding method known as phasechange Super plastic diffusion bonding (Transformation Super plastic Diffusion Bonding). Super plastic conditions, the material under stress in the smaller plastic deformation has a very good ability to flow the process of super plastic materials in a highly activated state of atoms, these materials will help to remove the surface oxide film to improve the bination of the close connections and speed up the atomic diffusion, resulting in a short period of time to achieve a reliable connection. Be welded as long as the phasechange material, the use of such methods can be welded. Repeated phasechange material is produced by thermal cycling to achieve, and therefore thermal cycling method has bee the core of this welding process links.Phase transformation super plastic diffusion bonding is a solidphase welding method, a general proliferation of welding and the characteristics of welding deformation, deformation mechanisms and the proliferation of mechanisms in the formation of welded joints are equally important role in the process. Phase transformation super plastic diffusion bonding joints or less after the formation of three phases.First, physical contact with the formation of phases:To the formation of the actual physical contact, the material must be removed on the surface oxide film and the adsorbed layer, but in the welding process and welding can pletely clear the oxide film is of utmost importance. Vacuum welding, the adsorbed layer and the oxide film under high temperature description, distillation, evaporation, chemical reaction and dissolution methods can be eliminated.In the process of diffusion bonding, only the material near the surface of each other, reaching between atoms can be caused by physical distance, will it be possible to form a welded joint quality. In general, the solder materials were processed through sophisticated, from the microview of its surface is still uneven. Therefore, in the beginning stages of diffusion welding, the welding material contact surfaces can only form of local contacts, while the remainder of the full contact is required by the interface of the plastic deformation of solder material, there is no part of the full contact holes are formed, the holes on the formation of adverse effect on joint reliability.Phase change materials in the super plastic deformation resistance under conditions of low stress in the low to the high occurrence of plastic deformation, welding interface of the holes can exist in the role of highplastic archeology to be filled rapidly. Phasechange material, the grains continue to migration and conversion, the surface oxid。2004[25] ，1996(6):2529[26] 李梅，2004(6):182141外文資料翻譯Transformation Super plasticity of Titanium Alloy Technology Research ConnectionThe outstanding characteristic of titanium is its high specific strength and excellent corrosion resistance, while at the same time has good heat resistance and low temperature performance, and practical application of a wide range. As long as the materials properly, not only can greatly increase the effectiveness of equipment, but also can bring significant economic benefits. In regard to corrosion resistance, titanium alloys in oxidizing and neutral media is extremely stable, the corrosion rate in sea water is far below the stainless steel, pared with platinum, it is suitable for the petroleum, chemical, electric power, metallurgy, agricultural chemicals, papermaking, shipbuilding, food and medical applications and health departments.Due to the characteristics of titanium alloy with the above, it is particularly suitable for aircraft and spacecraft materials design is required. Aviation Industry Development and Application of titanium alloys is the first sector. The beginning of the fifties, the United States succeeded in the use of a titanium aircraft, although at the time of each aircraft being used for only 1% the weight of the structure of titanium, but titanium has opened up applications in the aviation industry in the broad road. Now, the titanium in the world has been widely used, small screws, nuts, such as connectors, up to the fuselage frame, every other frame, such as structural parts, and even more than 6 meters long, weighing two tons of the main support beam of the landing gear. For highspeed fighters, as a result of highspeed and high maneuverability, the aircraft structure as far as possible the requirements of light, heat capacity at the same time。2004[3] ，2002，31(4):29~32[4] ]，1990(5):28~30[5] :山東科學(xué)技術(shù)出版社，1985[6] :大連理工大學(xué)出版社，1988[7] ，1998，27(2):49~50[8] 王玉琦，:北京航空航天大學(xué)出版社，1993[9] ，2005，25(2):48~50[10] ，1990(5):28~30[11] ，1996(6):25~29[12] :化學(xué)工業(yè)出版社，1997[13] 北京化工學(xué)院，:輕工業(yè)出版社，1983[14] ，1992(7):8~9[15] 曹民干，:化學(xué)工業(yè)出版社，2003[16] Stephen P ClarkeP Eng. Agricultural Engineer/OMAF. Recycling Farm Plastic Films[17] Headley Pratt Consulting. Understanding Plastic Film. The American Plastics Council[18] [19] .[20] 龔瀏澄，[21] [22] [23] [24] —處理1997(1):31~35[2] —處理憶往昔，每次回到家時(shí)父母的欣喜之情，每次離家時(shí)父母的依依不舍之眼神，電話和信件中的殷殷期待和思念之語(yǔ)，皆使本人刻苦銘心，目前除了學(xué)習(xí)成績(jī)尚可外無(wú)以為報(bào)，希望以后的學(xué)習(xí)、工作和生活能使父母寬慰。 感謝在大學(xué)三年學(xué)習(xí)期間給我傳授諸多專業(yè)知識(shí)的的各位老師，感謝我的同學(xué)們，謝謝你們給予我的幫助！ 感謝和我一起生活三年的室友，是你們讓我們的寢室充滿快樂(lè)與溫馨， 愿我們以后的人生都可以充實(shí)、多彩與快樂(lè)！ 回首本人的求學(xué)生涯，父母的支