Upper bainite is formed at temperatures typically above and is a much tougher microstructure, whereas lower bainite, produced at temperatures below 350 ° C, is stronger but much more brittle.
Upper bainite is formed at temperatures typically above, whereas lower bainite is stronger but much more brittle. Lower bainite is produced at temperatures below 350 ° C. Upper bainite is a much tougher microstructure. Lower bainite is stronger but much more brittle. Lower bainite is produced at temperatures below 350 ° C.