effect of hot-isostatic pressing on microstructure and mechanical properties of second generation single crystal superalloy dd6

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ID: 255414
2016
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Abstract
Effects of the hot-isostatic pressing (HIP) temperature (1280,1300,1320℃) on microstructures and mechanical properties of a second generation single crystal superalloy DD6 were investigated. The results show that the HIP treatment significantly decrease the cast porosity number of DD6 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 unchanged the creep lives, While they greatly promote the low cycle fatigue lives. The elimination of cast microspores using the HIP treatment of 1300℃/100MPa, 4h result in the inhibition of crack initiation during fatigue and improve the low cycle fatigue lives one order of magnitude larger than that after standard heat treatment.
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hui-ming2016journaleffect Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;GUO Hui-ming;ZHAO Yun-song;ZHENG Shuai;XU Jian-wei;ZHANG Jian;LUO Yu-shi;DONG Jian-xin
Journal adsorption science and technology
Year 2016
DOI
10.11868/j.issn.1001-4381.2016.10.009
URL
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.10.009
Keywords
porosity mechanics of materials

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