Precipitation Kinetics of M2C Carbide in Severely Ausformed 13Co-8Ni Secondary Hardening Steels

被引：8

作者：

Cho, Ki Sub ^{[1
]}

Park, Sung Soo ^{[1
]}

Kim, Hong Kyu ^{[2
]}

Song, Young Beum ^{[2
]}

Kwon, Hoon ^{[1
]}

机构：

[1] Kookmin Univ, Ctr Adv Mat & Technol CAMT, Seoul 136702, South Korea

[2] Agcy Def Dev ADD, Taejon, South Korea

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2015年 / 46A卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

TRANSFORMATION KINETICS; PHASE-TRANSFORMATION; ALLOYING ADDITIONS; FRACTURE-BEHAVIOR; NI; MODEL; CO; MICROSTRUCTURE; DEFORMATION; TEMPERATURE;

D O I：

10.1007/s11661-015-2750-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

With continuous heating calorimetric data as a basis, the kinetics of M2C formation during isothermal aging was modeled in severely ausformed 13Co-8Ni steels using the Johnson-Mehl-Avrami theory coupled with a variation of effective activation energy with respect to the degree of transformation. These results were compared with small-angle neutron scattering measurements and discussed in terms of variations in the thermodynamic and kinetic behavior of M2C precipitation. In particular, the M2C carbides in the deformed samples contained more Fe content compared with the non-deformed samples. As this can be ascribed to the ausforming effect increasing the driving force for M2C nucleation, it consequently leads to the decrease of the growth/coarsening rate for M2C carbides at over-aged conditions. (C) The Minerals, Metals & Materials Society and ASM International 2015

引用

页码：1535 / 1543

页数：9

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