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Properties of TiAl sheet pack-rolled at temperatures below 1000 [degrees]C

TiAl alloy specimens with microcrystalline (MC, grain size is 5 [mu]m) and submicrocrystalline (SMC, grain size is 0.4 [mu]m) structures were successfully pack-rolled to sheet with a thickness down to 0.4 mm in the temperature ranges of 800 [degrees]C to 1000 [degrees]C and 900 [degrees]C to 1000 [degrees]C, respectively. An 18/10 stainless steel was used as a rather inexpensive can material for pack-rolling. Unidirectional rolling and bidirectional cross-rolling were used. Because of a wider temperature range for pack rolling and a lower cost for production of the alloy preforms, the microcrystalline structure was found to be a better microstructural condition for the TiAl sheet rolling. ...

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