3.3. MATERIAL PROPERTY INPUTS
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EAf,high is the elastic modulus of the austenite phase having an Af temperature of Afhigh . EAf,high = 34, 000 MPa
(3.17)
Afhigh is the second Af temperature at which the austenite elastic modulus is defined. Afhigh = 37◦ C
(3.18)
Afinf lection is the temperature at which the Af vs E relationship transitions from the low temperature curve to the high temperature curve, as shown in Figure 3.3. Afinf lection = 19◦ C
(3.19)
The calculated value of E, the austenite elastic modulus for a material having the specified Af , depends on the Af temperature. For Af less than Aflow :
Ecase1 = EAf,low
(3.20)
For Af between Aflow and Afinf lection , the green curve of Figure 3.3 applies:
Ecase2 = EAf,low − 1.9 · (Af − Aflow )3
(3.21)
For Af between Afinf lection and Afhigh , the orange curve of Figure 3.3 applies:
Ecase3 = EAf,high + 5.9 · (Afhigh − Af )3
(3.22)
For Af equal to or above Afhigh :
Ecase4 = EAf,high
(3.23)
In this example, with Af = 27, Ecase3 applies. E = Ecase3 for Af = 27◦ C E = 34059 MPa
(3.24)