采用Gleeble-1500热模拟机对喷射成形8009耐热铝合金进行热压缩试验研究,观察该合金在热压缩变形中的流变应力行为.通过透射电镜对压缩合金的组织进行观察,X射线衍射仪对合金中的相进行确定.结果表明,喷射成形8009耐热铝合金是正应变速率敏感材料.在应变速率为0.01 s-1、应变温度为420℃条件下,材料的正应力水平在110～130 MPa范围内,因此在420℃下进行热加工时,施加的应力应当高于130 MPa.沉积态8009耐热铝合金分别在380℃、420℃、460℃,0.01 s-1的应变速率压缩后,合金中的相相近,主要包括α-Al和体心立方结构的α-Al12(Fe,V)3Si相,同时合金中还包含少量的θ-Al13 Fe4相,Al9 FeSi3相和Al12 Fe3 Si相.
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