论文部分内容阅读
研究了热等静压(HIP)连接DD402单晶合金与FGH95粉末合金的扩散偶中,DD402单晶合金的γ’相筏形化过程.提出了一种新的γ’相筏形化的机理,分析了γ’相筏形化的驱动力问题,建立了γ’相筏形化过程的物理模型.讨论了筏形γ’片层厚度与原始γ’相的尺寸、体积分数以及γ’相形成元素的扩散流量之间的关系.结果表明,单晶合金的γ’筏形化是由于其形成元素的扩散使γ’定向长大.筏形化的过程包括两个阶段:一是γ’粒子的定向连接阶段;二是筏形γ’片层的平坦化.筏形化γ’的初始片层厚度及筏形化方向主要由γ’原始尺寸及晶体取向决定.
The γ ’-phase raftization of DD402 single crystal alloy hot-isostatic pressed (HIP) was investigated in the diffusion couple of DD402 single crystal alloy and FGH95 powder alloy. A new γ’ -phase raft-forming mechanism was proposed , The driving force of γ ’phase raft formation was analyzed and the physical model of γ’ phase raft formation was established. The relationship between the γ ’lamellar thickness and the original γ’ phase size, volume fraction and γ ’phase The results show that the γ ’raft formation of single crystal alloy is due to the diffusion of the forming elements, which leads to the γ’ orientation and growth.The raftization process includes two stages: one is γ ’ The second is the planarization of the raft-shaped γ ’sheet.The initial sheet thickness and raft orientation of the rafted γ’ mainly depend on the γ ’original size and the crystal orientation.