A study of the crack path in flake graphite cast iron using profilometric analysis

Ray, K. K.; Mitra, Rahul; Bhaduri, Amit

doi:10.1080/09534962.1995.11819195

Cited by 2 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The roughness or waviness on the surface has been quantitatively evaluated through profilometric analysis involving the measurement of the linear roughness index (k p ) for three different true-segment lengths (L t ). [33][34][35] The segments have been chosen so as to have a crest or trough at the center. All crests and troughs in the fracture profile have been considered.…”

Section: Alligatoring and Its Preventionmentioning

confidence: 99%

Microstructural Evolution, Hardness, and Alligatoring in the Mushy State Rolled Cast Al-4.5Cu Alloy and In-Situ Al4.5Cu-5TiB2 Composite

Herbert

Sarkar

Mitra

et al. 2007

Metall Mater Trans A

Self Cite

View full text Add to dashboard Cite

A comparative study has been carried out on the microstructural evolution and hardness of the Al-4.5Cu alloy and in-situ Al-4.5Cu-5TiB 2 composite, either water quenched from, or subjected to, rolling at mushy zone temperatures. The cast alloy shows coarse a-Al dendrites, while the composite contains rosette-type grains with TiB 2 particles located at the grain boundaries. The plate-shaped specimens, in cast or pre-hot-rolled conditions, have been rolled at temperatures corresponding to 10, 20, or 30 vol pct liquid to thickness reductions in the range of 2.5 to 10 pct. While the alloy could be rolled defect free, the cast composites undergo alligatoring, except when thickness reduction is 5 pct or lower at 30 vol pct liquid. Alligatoring is caused by strain localization and shear failure, and is prevented partially on prior hot rolling, causing homogenization and equiaxed grain formation. Mushy state rolling leads to nearly equiaxed grains having bimodal size distributions. The surfaces with a larger volume fraction of finer grains exhibit higher microhardness than the center. Exposure to mushy zone causes grain growth in the alloy but not in the composite, due to Zener pinning by TiB 2 particles. On rolling at low liquid content to a large thickness reduction, the unmelted grains deform and workharden significantly, causing an increase in hardness.

show abstract

Section: Alligatoring and Its Preventionmentioning

confidence: 99%