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Due to the microstructure and properties of the titanium alloy is more sensitive to the deformation of the thermal processing parameters , so a smaller range of parameters for its thermal processing . Therefore, the study of the deformation behavior of materials under different deformation conditions and internal microstructure changes may be reasonable to determine the thermal processing of materials and control of product quality to provide a scientific basis and theoretical guidance . This article first discusses the characteristics and mechanism of superplastic deformation of TC4 titanium alloy mechanical properties of superplastic deformation , tensile test , to determine the optimum superplastic temperature of 900 ° C , the best strain rate of 1 × 10 - 3s - 1 , corresponding to the strain rate sensitivity index m values ??up to 0.531 . Microstructure observation showed TC4 titanium alloy superplastic deformation , the crystal grains preferably equiaxed the newborn alpha grain coarsening , and the deformation temperature the higher , the smaller the strain rate , the smaller the original grain , grain grew up , grew faster rate ; TC4 alloy superplastic deformation mechanism is grain boundary sliding and grain rotation . In order to improve production efficiency, the initial establishment of the the superplastic forming database management system . On the basis of comprehensive analysis of superplastic forming technology , the design concept of the superplastic forming database management system . In order to achieve the system to be able to call the database in the LAN data , using a Layer 2 client / server ( C / S ) architecture , the process design of the system . Selected Microsoft Access 2003 as a database management system and database management system based on the database needs analysis , conceptual design, logical design , build, and configure the database , and established among the tables correspond to each other . Discussed the development and implementation of a database system user interface . Use the Visual Basic 6.0 database programming software and the main interface of the system , user interface and management interface .
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