R.L.Dreshfield and R.L.Ashbrook,Sigma Phase Formation and its Effect on Stress-rupture Properties of IN-100, NASA-TN-D-5185.1969.
[6]
R.L.Dreshfield and R.L.Ashbrook,Effects Sigma Phase Formation on Some Mechanical Properties of Wrought Nickel-Base Superalloy(IN-l00),NASA-TN-D-7654,1974.