公开(公告)号：US5244515A

公开(公告)日：1993-09-14

申请号：US845126

申请日：1992-03-03

Applicant: Marie T. Miglin

Inventor： Marie T. Miglin

IPC: C22F1/10 ,  G21C3/07

CPC classification number: C22F1/10 ,  G21C3/07 ,  G21Y2002/103 ,  G21Y2004/201 ,  Y02E30/40

Abstract: A method of increasing intergranular stress corrosion cracking resistance of Alloy 718 in water reactor environments is described where the alloy is heat treated at a high solution annealing temperature to dissolve grain boundary precipitates formed during thermomechanical processing. A water quenching step is advantageously employed following the high solution annealing. The alloy is then aged at two separate temperatures and finally air cooled to room temperature.

Abstract translation: 描述了在水溶液环境中增加合金718的晶间应力腐蚀开裂性的方法，其中合金在高固溶退火温度下热处理以溶解在热机械加工过程中形成的晶界析出物。 在高固溶退火之后有利地采用水淬步骤。 然后将合金在两个独立的温度下老化，最后空气冷却至室温。

公开(公告)号：US5047093A

公开(公告)日：1991-09-10

申请号：US364759

申请日：1989-06-09

Applicant: William L. Kimmerle ,  Marie T. Miglin

Inventor： William L. Kimmerle ,  Marie T. Miglin

IPC: C22F1/00 ,  C22F1/10

CPC classification number: C22F1/10

Abstract: A method of increasing intergranular stress corrosion cracking resistance of Alloy 718 in water reactor environments is disclosed. The Alloy is heat treated at a high annealing temperature to dissolve .delta. precipitates. The absence of .delta. particles at the grain boundaries increases the elemental homogeneity at the boundaries and increases intergranular stress corrosion cracking resistance. In addition, the absence of .delta. phase at the grain boundaries decreases the crack propagation rate.