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- W628736166 abstract "研究了在1083—1483K温度范围内,固溶温度对超纯净18Ni(350)马氏体时效钢断裂韧性(K_(IC))的影响,通过透射电镜(TEM)研究了马氏体时效钢微观组织的变化,结合相变曲线和断口扫描电镜(SEM)观察,探讨了固溶温度对断裂韧性的影响机理,结果表明:超纯净马氏体时效钢的断裂韧性(K_(IC))随着固溶温度的升高或再结晶晶粒尺寸的长大而增加,不存在常见的Ti(C,N)在晶界偏聚而引起的“热脆”现象。因溶态马氏体时效钢由单一的马氏体板条组成,其形貌、间距以及位错密度不受固溶温度的影响,在时效过程中,随着固溶温度的升高或再结晶晶粒的粗化,Ni_3(Mo,Ti)等时效析出相在晶界或板条界的偏聚程度逐渐加重并导致基体软化,合金元素Ni,Mo的富集诱发了逆转变奥氏体形成,这使裂纹尖端易于钝化而表现出韧窝状穿晶断裂和保持较高的断裂韧性。" @default.
- W628736166 created "2016-06-24" @default.
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- W628736166 date "2003-04-11" @default.
- W628736166 modified "2023-09-24" @default.
- W628736166 title "固溶温度对超纯净18Ni(350)马氏体时效钢断裂韧性及微观组织的影响" @default.
- W628736166 hasPublicationYear "2003" @default.
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