Engineering stress-strainors(e)curvesforthevariousor-
ientations overawiderangeoftemperaturesareshownin Fig. 4.
The averagevaluesoftheengineeringyield(sy) andultimate(su)
stresses areplottedin Fig. 5a andb,respectively,whilethecor-
responding uniform(eu) andtotal(et) elongationsareshownin
Fig. 5c andd,respectively. Table3 summarizes theaverageand
standarddeviationsofthetensilepropertiesasafunctionof
temperatureandorientation.Notesy wasdeterminedatthe
standardnominal0.2%offset.Notethedifferencesins(e)inthe
elastic regimeareduetotemperature-dependentcomplianceof
the specimenand fixture couplingandtheinitiallowloaddis-
placements. Fig. 6 plots thetruestress(s) versustrueplasticstrain
(ε) curvesstartingatthenominal0.2%offset.