The Effect of Grain-Boundary Structure on the Tensile Fracture Behaviour of Hot-Isostatically Pressed 713lc Alloy Compacts

Wallace, W.E.; Wiebe, W. J.; Whelan, EP; Dainty, R.V.; Terada, T.

doi:10.1179/pom.1973.16.32.016

Cited by 11 publications

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“…The fracture surfaces appeared completely along the PPB (Figure 11c). The presence of a PPB decorated with brittle oxide and carbide particles resulted in premature failure [11,29]. The degree of ductility of a material is related to the relaxation process that occurs at the crack-tip.…”

Section: The Effects Of Ppb On the Mechanical Properties Of Hip Specimentioning

confidence: 99%

Influence of Powder Surface Contamination in the Ni-Based Superalloy Alloy718 Fabricated by Selective Laser Melting and Hot Isostatic Pressing

Kuo

Kakehi

2017

Metals

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The aim of this study was to gain a deep understanding of the microstructure-mechanical relationship between solid-state sintering and full-melting processes. The IN718 superalloy was fabricated by hot isostatic pressing (HIP) and selective laser melting (SLM). Continuous precipitates were clearly localized along the prior particle boundary (PPB) in the HIP materials, while SLM materials showed a microstructure free of PPB. The mechanical properties of specimens that underwent SLM + solution treatment and aging were comparable to those of conventional wrought specimens both at room temperature and 650 • C. However, a drop was observed in the ductility of HIP material at 650 • C. The brittle particles along the PPB were found to affect the HIP materials' creep life and ductility during solid-state sintering.

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Section: The Effects Of Ppb On the Mechanical Properties Of Hip Specimentioning

confidence: 99%