Abstract
By employing a combination of fractography and Auger analysis on samples of alloy steel fractured at 77 K, it is demonstrated that phosphorus can segregate to prior-austenite grain boundaries during the austenitization cycle. Segregation is more pronounced at low austenitizing temperatures in Ni–Cr steel and the addition of 0·6%Mn to the steel increases the degree of segregation at all austenitizing temperatures. The consequences of phosphorus segregation with respect to quench cracking and 350°C embrittlement are discussed briefly.
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