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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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a2017合金半固态压缩的变形机制和成形性能
Keywords: 材料合成与加工工艺,半固态金属,压缩变形,a
Abstract:
？利用gleeble--1500热学--力学模拟机,对a2017半固态合金进行半固态压缩变形实验,分析了应力-应变曲线和组织变化,研究了压缩变形机制及成形性能.结果表明,用单辊搅拌冷却(scr)技术制备的a2017半固态合金的组织为细小均匀的非枝晶等轴晶,二次加热后可转化为均匀的球形晶和共晶液相组成的半固态组织;a2017合金半固态压缩变形的塑性好、变形抗力低;随着变形温度的升高或者变形速率的降低,变形的抗力降低.在稳定的流动变形阶段,a2017合金的半固态变形机制主要由液相流动和固相颗粒的转动与滑动组成,触变性能稳定,最大半固态加工变形范围为60\%左右.
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