Cover -- FLAKES OR HACRACKS IN CHROMIUM STEEL WITH A DISCUSSION ON SHATTERED ZONES AND TRANSVERSE FISSURES IN RAILS
Id: 153454

FLAKES OR HACRACKS IN CHROMIUM STEEL WITH A DISCUSSION ON SHATTERED ZONES AND TRANSVERSE FISSURES IN RAILS

36 pp. (English).

Summary

36с

1925г

;' FLAKES " OR • KAl^C RACKS-' IX CHROMIUM ^ W STEEL. WITH A DISCUSSION ON ■•SHATTERED _H_ _ ZONES "

lfl$ HAILS.

t"5

.\vn ••7|M\n\-v.inv FISSURES "' IN roc. nvE/insHAn / "t

HAywHO-TEXHMSeOKAE /. " /

EHEJ1HOTEKA POOP ; * ^ *  , / / .'

a defect known a" *mne-fiaUv» or jfo/.•"•." (America), har-crack* or hiir-U!"€•■" (Creat Frifainj. F/oc/.v;/ (biermany)....(More) am! nmnres liq»i::i*" * (Trance i. Las received much attention among manu-facttuvrs and in-vector-; of alloy "-A forging-, particularly during-the war. '.i Lis defect luls the appearance of approximately circular, bright, coarsely crystalline spots of varying size (from ■2 to 2*) millimetres), which may hi- -een in lor tine-grained fracture of the heat-treated forging. It may aFo appear as lines without appreciable width on machined or poh-hed surface-;.

My^t of the literature existing on this -ubject was published in America in lill'.i and l'.'-io. From these pnh!ication" it may he gathered that tlakes—the defect will lie so {cma-d in the present ]taper—were at times the cau.-e of serious rejections in that Country. A similar -tatement referring to aircraft drop forgings, manufactured in Great Britain during the war. is made by Aitchi-on.(I:;}

Previous Literature concerning Flakes. An abbreviated review of previon- literature on flake-, which

i- un en m 1 an) ih. b" ..f i.ubii

lie i'.-li-i'elJCe

na- come to tli«- a'-it Fa - uu number- in column 2 r-F-i of ih,- p.v--nt pep-r.

i-roni an examination • "! fable 1. it appear- tiiai llak.- Ji;j\ • -been ob-ei-yid mainly in alloy --(-,-1-, -;r-L a- nickel, nickel chromium, chromiuiu. and mm:-! en -i,-e]-. but were al-o found in carlw.m -reel. With l'" w ■ \e, i a i, ,n-. 'lake- «iv eon-i.L-re,I to

actual e);.;■],:-. F; 1. j.vid l.i !;.e "•,!.!-.•. ..r jii"--'.-.lilinalii cail-e.

of hake- vari.»u» opi::iun  have hern expi■"■--(-.1. involving raw