材料工程2016，Vol.44Issue(10)：60-67,8.DOI:10.11868/j.issn.1001-4381.2016.10.009
热等静压对第二代单晶高温合金DD6显微组织和力学性能的影响
Effect of Hot-isostatic Pressing on Microstructure and M echanical Properties of Second Generation Single Crystal Superalloy DD6
郭会明 1赵云松 2郑帅 1许剑伟 3张剑 1骆宇时 1董建新1
作者信息
- 1. 北京航空材料研究院先进高温结构材料重点实验室，北京100095
- 2. 北京科技大学材料科学与工程学院，北京100083
- 3. 北京科技大学新金属材料国家重点实验室，北京100083
- 折叠
摘要
Abstract
Effects of the hot‐isostatic pressing (HIP) temperature (1280 ,1300 ,1320℃) on microstruc‐tures and mechanical properties of a second generation single crystal superalloy DD 6 were investiga‐ted .T he results show that the HIP treatment significantly decrease the cast porosity number of DD 6 compared with standard treated specimens .Especially ,the cast porosity volume fraction is deceased from 0 .31% to 0 .04% after the HIP treatment of 1300℃/100MPa ,4h .The cast eutectic volume fractions are remarkably reduced with increasing HIP temperature .The HIP treatments nearly un‐changed the creep lives ,While they greatly promote the low cycle fatigue lives .The elimination of cast microspores using the HIP treatment of 1300℃/100M Pa ,4h result in the inhibition of crack initi‐ation during fatigue and improve the low cycle fatigue lives one order of magnitude larger than that af‐ter standard heat treatment .关键词
热等静压/单晶高温合金/显微疏松/力学性能Key words
hot-isostatic pressing/single crystal superalloy/porosity/mechanical property分类
矿业与冶金引用本文复制引用
郭会明,赵云松,郑帅,许剑伟,张剑,骆宇时,董建新..热等静压对第二代单晶高温合金DD6显微组织和力学性能的影响[J].材料工程,2016,44(10):60-67,8.
