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55SiMnMo 钢的正火组织由无碳化物上、下贝氏体,马氏体和残余奥氏体组成。贝氏体含有中脊线,组织单元和位错;马氏体含有孪晶;残余奥氏体含有高密度位错。奥氏体的位向关系和惯习面表明它以切变机制生成。从界面富碳和界面应力弛豫两方面阐述了贝氏体组织单元以及贝氏体片条的生成机制。

关键词: 贝氏体 , subunit , midrib , orientation relationship , habit plane

氮对HK50合金组织和力学性能的影响

于永泗 , 曹智本 , 王富岗 , 郭晓冰

金属学报

本文研究了氮对HK50合金组织和力学性能的影响。结果表明,当氮含量超过0.065％时,层状胞晶的体积分数随氮含量的增加而增加。层状碳化物的惯习面是{111}γ。层状胞晶析出前后,氮的分布无显著变化。碳的扩散激活能随氮含量的增加而显著降低。层状碳化物的存在对高温蠕变和冲击性能是有害的。

关键词: HK50合金 , larmellar carbide , habit plane , diffusion activation energy

4Cr5MoV1Si(H13)钢合金氮化物的形貌和晶体学特征

罗承萍 , 赵方

金属学报

应用TEM研究了H13钢580℃软氮化扩散层中同时生成的三种合金氮化物即CrN,VN和Mo_2N的形貌、位向关系及惯习面,发现它们由混合偏聚区经有序化连续转变而成,并且其形貌和晶体学特征与由不变线应变模型所预测的一致。

关键词: 合金氮化物 , mixed cluster , habit plane , invariant line strain

沉淀相变晶体学模型的研究进展

邱冬 , 张文征

金属学报

相变晶体学是对工程材料进行组织设计的重要理论基础。本文综述了国内外沉淀相变晶体学模型的最新研究进展，对各个模型的使用前提、适用条件、求解思路以及自身的局限性分别进行了评述；通过比较不同模型的在求解能力方面的差异，指出将O线模型和近重位位置模型相结合的方法将为理解相变晶体学特征提供更有力的理论工具。

关键词: 沉淀相变 , theoretical model , orientation relationship , habit plane , null

300M超高强度钢板条马氏体的晶体学研究

罗承萍 , 许麟康 , 查健中

金属学报

电子衍射和晶体学测量证实,300M超高强度钢板条马氏体的惯习面为{335}_A型,与奥氏体的位向关系偏离K-S关系2.5°,为G—T关系,相邻板条间绕其公共面{110}_M法线相对旋转约60°,形成板条间不同的位向关系,包括近似{112}_M孪晶关系。

关键词: 板条马氏体 , habit plane , ultrahigh-strenth steel , steel 300M

马氏体相变晶体学的简易矢量分析方法

顾新福张文征

金属学报 doi:10.3724/SP.J.1037.2010.00571

基于界面错配可以通过一组缺陷松弛的假设, 发展了一种简易矢量分析法来计算界面包含一组缺陷的系统的相变晶体学. 通过该方法可以方便地求解惯习面的取向. 本文运用该方法求解了fcc/bcc系统中经典马氏体表象理论对应的相变晶体学, 所有计算结果与文献报道完全一致. 并根据矢量分析方法求解了满足上述假设条...

关键词: transformation crystallography , habit plane , invariant plane

MORPHOLOGY AND CRYSTALLOGRAPHY OF ALLOY NITRIDES IN STEEL 4Cr5MoV1Si(H13)

LUO Chengping(C.P.Luo) ZHAO Fang South China University of Technology , Guangzhou , China

金属学报(英文版)

A TEM investigation was made on the morphology,orientation relationship and habit plane of three alloy nitrides,namely CrN,VN and Mo_2N simultaneously formed within the diffussional nitrided layers in an H13 steel nitrided at 580℃.It was.found that the nitrides were precipitated by continuous cluste...

关键词: alloy nitride , null , null , null

CHARACTERISTICS OF MARTENSITE IN A HIGH CARBON FERROALLOY

LIU Yumen WU Shanghua Xi'an Jiaotong University , Xi'an , China LIU Yumen Department of Materials Science and Engineering , Xi'an Jiaotong University , Xi'an , China

金属学报(英文版)

Some characteristics of plate martensite in a 1.03% C ferroalloy have been studied by using the transmission electron microscopy.The habit plane of the plate martensite in this ferroalloy was found to be close to{224}_f.The morphology,distribution,coalescence and curving of martensite as well as the...

关键词: high-carbon ferroalloy , null , null , null , null

EFFECT OF NITROGEN ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ALLOY HK50

YU Yongsi CAO Zhiben WANG Fugang , Dalian University of Technology , Dalian , ChinaGUO Xiaobing Jinzhou Institute of Technology , Jinzhou , China Associate Professor , Dept.of Materials Science , Dalian University of Technology , Dalian 116024 , China

金属学报(英文版)

The volume fraction of the lamellar carbide cell in HK50 alloy may be increased with the in- crease of nitrogen content over 0.065%.The habit plane of l(?)mellar carbide is {111}_γ.The distribution of nitrogen changes no more before or after the precipitation of lamellar structure. The diffusion act...

关键词: alloy HK50 , null , null , null

TEM Studies on Martensitic Transformation in Fe-Cr-W-V-C Alloy

WU Shanghua LIU Yumen Materials Science Institute , Zhongshan University , Guangzhou , 510275 , China.Department of Materials Science and Engineering , Xi'an Jiaotong University , Xi'an , 710049 , China.To whom correspondence should be addressed.

材料科学技术（英文）

The martensitic transformation in Fe-Cr-W-V-C alloy has been investigated by TEM.The habit plane of martensite is near (252)_f, the austenite/martensite orientation relationship is Kurdjumov-Sachs'.In the martensite plates there are twins on (112)[ 1]_b,dislocation tangles and the lattice defects on...

关键词: martensite , null , null , null

材料期刊网

55SiMnMo钢正火组织的精细结构和晶体学特征

氮对HK50合金组织和力学性能的影响

4Cr5MoV1Si(H13)钢合金氮化物的形貌和晶体学特征

沉淀相变晶体学模型的研究进展

300M超高强度钢板条马氏体的晶体学研究

马氏体相变晶体学的简易矢量分析方法

MORPHOLOGY AND CRYSTALLOGRAPHY OF ALLOY NITRIDES IN STEEL 4Cr5MoV1Si(H13)

CHARACTERISTICS OF MARTENSITE IN A HIGH CARBON FERROALLOY

EFFECT OF NITROGEN ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF ALLOY HK50

TEM Studies on Martensitic Transformation in Fe-Cr-W-V-C Alloy

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