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首页> 外文会议>International Conference on Creep and Fracture of Engineering Materials and Structures >Influencing Factors of Stress Rupture at 750 deg C Temperature for Cast Nickel Base Superalloy K403
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Influencing Factors of Stress Rupture at 750 deg C Temperature for Cast Nickel Base Superalloy K403

机译：铸镍基超合金K403的750℃温度下应力破裂的影响因素

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The standard heat treatment of cast nickel-basesuperalloy K403 is the solid solution treatment of 1210 C /4h,air-cooling. It is very difficult to meet the requirements of theintermediate temperature stress-rupture life regulated byAviation Standard HB5155. In order to resolve the aboveproblem, some factors influencing intermediate stress-rupturelife have been explored. The results showed that theintermediate temperature stress-rupture properties impaired bytreatment of 1210 deg C /4h were due to precipitation of toosmall #gamma#' phase (< 0.2 #mu# m) in grains and absence ofthe secondary carbides at grain boundaries. The dendritic patternappears at the fracture surface and there is no slip trace at thegauge length part of specimens treated by 1210 deg C/4h, butthe crystallographic plane at fracture surface and the extensiveslip can be observed for the specimens treated by 1180 deg C/4h. TFM results have shown that during intermediatetemperature deformation the dislocation of 1/2<110> moves tothe interface of #gamma#/#gamma#' and cuts #gamma#' phaseto form the high energy antiphase boundaries. The finer#gamma#' can be cut and passed easily by dislocation and has apoor resistance to intermediate temperature creep. The finerdendrites and the microstructure containing intergranular M6Ccarbide with envelope of #gamma#' and residual coarse#gamma#' within grains were beneficial. Therefore high coolingfate during solidification and partial solid solution treatment of1180 deg C/4h are suitable for a turbine blade alloy K403
机译：铸镍 - BaseSuperalloy K403的标准热处理是固体溶液处理1210℃/ 4h，空冷。非常困难符合Cintermediate温度胁迫破裂寿命调节的候补标准HB5155是非常困难的。为了解决上述问题，已经探讨了影响中间压力的因素。结果表明，在1210℃/ 4H的晶粒中的Toosmall＃γ＃'相（<0.2＃mu＃m）沉淀到晶粒边界的谷物中的Toosmall＃Gamma＃'m）沉淀，Cintermediate胁迫破裂性能受损。断裂表面的树突图案插图和在由1210℃/ 4h处理的试样的kauge长度部分上没有滑动迹线，但是在裂缝表面处的晶体平面和伸长率的晶体形成为1180℃/ 4h处理的样品。 TFM结果表明，在介质时，在介质期间变形期间，1/2 <110>的位错移动#gamma＃/＃gamma＃'和剪切#gama＃'phaseTo的界面形成高能量反相边界。可以通过位错切割和通过更精细的#Gamma＃'，并具有对中间温度蠕变的抗置力抵抗力。谷物中的晶粒与晶粒中的晶体晶间m6carbide的细胞和含有晶体的微观结构是有益的。因此，在凝固过程中高冷却液和局部固溶处理1180℃/ 4h适用于涡轮叶片合金K403

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