High cycle fatigue and fracture behaviour of a hot isostatically pressed nickel-based superalloy

Abstract

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A novel near α-Ti alloy prepared by hot isostatic pressing: Microstructure evolution mechanism and high temperature tensile properties

“…In our previous work, a monolithic Ti6Al4V disk was successfully fabricated using NNS-HIP and the relative density of the disk reached 99.5% [24]. So far, HIP processing of Ti6Al4V [25][26][27], TiAl [28][29], Nickel-based superalloy [30][31][32][33][34], and Al-based powders [35], etc., has been studied. However, up to now, to the best of authors' knowledge, there was no literature reported on the fabrication of a near-α high temperature titanium alloy (the series of Ti-Al-Sn-Zr-Mo-Si) by HIP process and the study of high temperature mechanical performance was rarely involved.…”

Healing Process of Casting Pores in a Ni-based Superalloy by Hot Isostatic Pressing

“…Although some work has been done on the elimination of casting pores in superalloys by HIP, most of the work concentrated on the exploration of the recovery of mechanical properties [17] . Quite few work concentrated on the healing mechanism during HIP.…”

Low‐cycle fatigue life prediction of powder metallurgy superalloy considering characteristic parameters of inclusions

“…Inclusion‐induced LCF crack initiation mainly includes inclusion/matrix interface cracking, inclusion cracking, and slip band or grain boundary cracking in the matrix surrounding the inclusion 6–8,10,14–16,18–20 . The crack initiation sites can be divided into surface, subsurface, and interior of the specimen 6,21,22 . The specific type and location of LCF crack initiation depend on inclusion size, morphology, and distribution, 14,21,23–25 material surface stress and strain state, 5,22 as well as loading conditions and temperatures 6,21 .…”

“…[6][7][8]10,[14][15][16][18][19][20] The crack initiation sites can be divided into surface, subsurface, and interior of the specimen. 6,21,22 The specific type and location of LCF crack initiation depend on inclusion size, morphology, and distribution, 14,21,[23][24][25] material surface stress and strain state, 5,22 as well as loading conditions and temperatures. 6,21 More specifically, the crack initiation process depends on the strain localization under external cyclic loading.…”