FGH96合金原始颗粒边界(PPB)及其对冲击性能的影响  

The previous particle boundaries(PPB) of FGH96 superalloy and its effects on impact property

作　　者：胡文波[1] 贾成厂[1] 胡本芙[1] 田高峰[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]北京航空材料研究院,北京100095

出　　处：《粉末冶金技术》2012年第5期327-333,共7页Powder Metallurgy Technology

基　　金：国家重点基础研究发展计划(973)资助项目(2010CB631204)

摘　　要：对Ar雾化(AA)FGH96合金的原始粉末颗粒表面、热等静压(HIP)和HIP+热处理(HT)后的合金断口分别进行俄歇电子能谱(AES)分析,并利用金相显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)对HIP态合金及HIP+HT态合金进行组织观察。结果表明:HIP态合金的PPB析出相主要由MC型碳化物和尺寸为1～5μm的大γ'相所组成;HIP态合金的夏比冲击断口是沿着PPB的位置断裂的,而HIP+HT态合金的冲击断口的断裂方式是穿晶断裂,呈韧-脆混合断裂的形式;HIP+HT态合金基本消除了PPB缺陷组织,冲击性能得到明显提高。The surface of original FGH96 superalloy powder particles prepared by argon gas atomization （ AA）, the impact fracture of superalloy prepared by hot isostatic pressing （ HIP）, HIP ＋ heat treatment （HT） were analyzed by auger electron spectroscopy （AES）. Microstructures of superalloy prepared by HIP and HIP ＋ HT were observed by optical microscope （OM）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）. The results show that the PPB of superalloy prepared by HIP mainly is composed of MC type carbides and big γ phase with size of 1 - 5 μm. Impact fracture of superalloy prepared by HIP showing the form of ductile fracture is parted along the PPB. The mode of impact fracture of superalloy prepared by HIP ＋ HT is trans-granular, and also the form of ductile-brittle fracture. Superalioy prepared by HIP ＋ HT basically eliminates PPB defects, and its impact property is significantly improved.

关 键 词：FGH96合金 PPB 冲击性能 

分 类 号：TG111.4[金属学及工艺—物理冶金]