微观结构
晶界
材料科学
合金
钛合金
冶金
相(物质)
结晶学
化学
有机化学
作者
Souvik Sahoo,Shibayan Roy
标识
DOI:10.1016/j.jallcom.2023.172265
摘要
The present work aims to understand the formation of microstructural features and their orientation development at the (prior) β grain boundary regions for Ti-6Al-4V alloy. The grain boundary region in the transformed microstructure primarily contains continuous grain boundary (GB) α phase along with GB α free regions at certain locations. Thin β phase generally separates adjacent GB α variants although it remains absent between many of them. The GB α variants usually follow Burgers orientation relationship (OR) with adjacent β grains although a few of them deviates from following Burgers OR and rather maintain near Potter or Pitsch-Schrader OR with the parent β grains on either side. While the GB α free locations possibly form due to the micro-segregation of β stabilizing elements during liquid→β transformation, the GB α variants without following Burgers OR are likely to associate with strong elemental partitioning during β→α transformation.
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