Abstract Hot isostatic pressing (HIP) is considered as an effective means in healing micro-defects inside the superalloy. However, can HIP effectively heal macro defect? Here we design a sealed cavity inside the superalloy to simulate the millimeter-sized cavity defect and focus on its healing behavior by HIP. Results show that HIP has the potential to heal the millimeter-scale cavity and the main mechanism is diffusion based on the features of diffusion zone and honeycomb structure during healing process. This exploratory work helps to better understand and broaden the applications of HIP and make the manufacturing sustainable.

中文翻译：

---

高温合金内部毫米级空洞缺陷热等静压愈合行为研究

摘要 热等静压（HIP）被认为是修复高温合金内部微缺陷的有效手段。然而，HIP 能否有效治愈宏观缺陷？在这里，我们在高温合金内部设计了一个密封腔来模拟毫米级的腔缺陷，并通过 HIP 关注其愈合行为。结果表明，HIP具有治愈毫米级空洞的潜力，主要机制是基于愈合过程中扩散区和蜂窝结构特征的扩散。这项探索性工作有助于更好地理解和拓宽 HIP 的应用，并使制造具有可持续性。