Relationship Between Microstructure and Nodular Corrosion of Zr4 Alloy

To make clear nodular corrosion of Zr-4 alloy and the relationship of the microstructure through different heat treatment,Zr-4 alloy is heat-treated by 4 kinds of heat treatment technology,then eroded for 8 with raw materials together in 500 ℃,10.3 MPa steam-gas.Weight added of corrosion is mensurated.After analyse with TEM after different heat treatment microstructure of Zr-4 and corresponding nodular corrosion of alloy,and SPP of this alloy have been demarcated with electron diffraction.Relationship between microstructure and nodular corrosion and basic reason of influencing nodular corrosion is the difference of Fe and Cr oversaturation in α-Zr alloy.