| Autor: |
Shaolin Wang, Sen-can Chen, Zongshi Hu, Xin-lu Yu |
| Rok vydání: |
1995 |
| Předmět: |
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| Popis: |
Publisher Summary This chapter develops a science-based methodology for analyzing, optimizing, and designing metal forming processes to control the microstructure and properties in a finite shape. The isothermal forging of a titanium alloys disk is analyzed by the rigid-viscoplastic finite element method (FEM). The nominal composition of titanium alloy TC11l that belongs to two-phase titanium alloy is Ti-6Al-3.5Mo-2Zr-0. 3Si. It has two kinds of microstructure under normal temperature: one is the acicular Weisz structure with good elevated temperature creep property obtained by heat treatment heating above the phase transition temperature (990°C) and the other is the equiaxed α + β structure with good elevated temperature fatigue property obtained by large deformation and heat treatment under phase transition temperature. The acicular β structure can be translated into the stable equiaxed α + β structure with the alloy's being heated and deformed under the phasetransus temperature. The property and extent of this transus depends on the heating temperature and strain. According to this, it is practicable to control the final structure and distribution by controlling blocking shape and forging parameters. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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