The effects of precipitation free zones on order strengthening in NIMONIC PE16 bi-crystals

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• 作者：Baither ; Dietmar ; Herding ; Thomas ; Krol ; Thorsten ; Reichelt ; Rudolf ; Nembach ; Eckhard
• 关键词：Nickel-base superalloy ; NIMONIC PE16 ; Order strengthening ; Precipitation free zones ; Scanning electron microscopy ; Transmission electron microscopy
• 刊名：Materials Science and Engineering: A
• 出版年：2001
• 出版时间：December, 2001
• 年：2001
• 卷：319-321
• 期：Complete
• 页码：279-283
• 全文大小：350 K

文摘

Bi-crystals of the nickel-base superalloy NIMONIC PE16 have been used as model systems to study the influence of precipitation free zones (PFZ) at grain boundaries on the critical resolved shear stress. Analyses of the slip lines and dislocation configurations have been performed. After ageing for different times, the samples have been compression tested. In addition to the primary slip systems in the interior of the grains, secondary ones were activated in a grain boundary affected zone. They allowed the compatible deformation. Influences of the PFZs were attributed to an easier penetration of slip bands into the neighbouring grains.