Solid Metal Induced Embrittlement of Metals

Kamdar, M. H.

doi:10.1016/b978-1-4832-8440-8.50408-7

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…Stoltz and Stulen [36] observed that Ag can cause solid metalinduced embrittlement on Ti-6Al-6V-2Sn above 232 °C. The mechanism of solid metal embrittlement (SME) is not yet fully understood, but it has been hypothesised that the embrittler could be adsorbed at crack tips and weaken the interatomic bonds of the base metal, which then promote brittle fracture through enhancing dislocation emission or decohesion ahead of crack tips [47,48,49]. Gordon [50] pointed out that surface self-diffusion was likely to be the transport mechanism of embrittlers solid metals.…”

Section: Crack Propagationmentioning

confidence: 99%

AgCl-induced hot salt stress corrosion cracking in a titanium alloy

Shi

Joseph

Saunders

et al. 2020

Preprint

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The mechanism of AgCl-induced stress corrosion cracking of Ti-6246 was examined at 500 MPa and 380 °C for 24 h exposures. SEM and STEM-EDX examination of a FIB-sectioned blister and crack showed that metallic Ag was formed and migrated along the crack. TEM analysis also revealed the presence of SnO 2 and Al 2 O 3 corrosion products mixed into TiO 2 . The fracture surface has a transgranular and brittle appearance with cleavage-like cracking of the α phase. Long, straight and non-interacting dislocations were observed in a cleavage-fractured primary α grain, with basal and pyramidal traces. This is consistent with a dislocation emission view of the the cracking mechanism.

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Section: Crack Propagationmentioning

confidence: 99%

AgCl-induced hot salt stress corrosion cracking in a titanium alloy

Shi

Joseph

Saunders

et al. 2020

Preprint

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Effect of Steel Composition and Processing Parameters on the Penetration Depth of Microcracks in ZnFe‐Coated Boron Steels

Järvinen

Rämö

Sabr

et al. 2021

steel research int.

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Liquid metal assisted cracking (LMAC) and so‐called microcracking are limiting the application of hot‐dip galvanized boron steels in the direct press hardening process. This study addresses the role of steel hardenability on the microcracking behavior of ZnFe‐coated (galvannealed) boron steels 22MnB5 and 22MnMoB8. Several soaking times and forming start temperatures in the range of 800–520 °C are examined using a laboratory press hardening equipment with a hat‐profiled forming tool. The results indicate that the penetration depth of microcracks can be reduced by improving the hardenability of steel, which enables hot forming in austenitic state at exceptionally low temperatures even without accelerated cooling procedures. The austenite decomposition of 22MnB5 leads easily to heterogeneous microstructure (ferrite + austenite/martensite) below the coating/steel interface, which promotes the penetration of microcracks. The crack depth is generally reduced with a conversion‐delayed 22MnMoB8 steel; however, a crucial reduction is attained only at lowest hot forming temperatures of 550 and 520 °C. The results of 22MnMoB8 uncouple the effect of high‐temperature ferrite formation from the microcracking mechanisms and suggest that the embrittling effect from zinc or zinc‐rich intermetallic phases plays a crucial role at conventional hot forming temperatures of 800–600 °C.

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