Guozheng KANG
,
Chuan YANG
,
Jixi ZHANG
材料科学技术（英文）
Using the experimental and theoretical methods, the tensile strengths and fracture mechanisms of Al2O3 short fiber reinforced Al-Mg alloy matrix composite at elevated temperatures were researched. The interfacial microstructural characteristics and the fracture surfaces of the composite at different...
关键词:
Fracture
,
null
,
null
,
null
叶威
物理测试
本文通过研究热处理工艺对金属TiC陶瓷刀具基体3Cr13组织的影响，提出了改善组织韧性的热处理工艺。该工艺下，基体原马氏体组织中沿晶界呈网状分布有脆性碳化物被消除，获得了晶粒细小的全马氏体组织，从而极大地提高了刀具基体的韧性，有效地提高了刀具抗断裂的能力，降低了断刀率。
关键词:
TiC
,
Cutter
,
Fracture
,
Heat treatment
叶威
物理测试
本文从金相组织及断口形貌分析两个方面对切割硬质材料的某金属陶瓷刀具断裂的原因进行了分析。结果表明，刀刃部位的镍铬基金属TiC陶瓷存在严重未烧结缺陷，成为起裂源；不合理的热处理工艺造成了刀具基体3Cr13晶粒粗大，并且沿晶界呈网状分布有脆性碳化物，导致基体脆性增加，在使用过程中发生沿晶断裂。
关键词:
刀具
,
Fracture
,
failure analysis
苏维国
,
穆志韬
,
刘涛
,
马晓乐
宇航材料工艺
doi:10.3969/j.issn.1007-2330.2014.02.005
金属韧性断裂是损伤累积的结果,以孔洞演化理论和细现损伤力学模型为基础,将韧性断裂机制分为拉伸型和剪切型两种类型,提出了一个适用于不同变形路径的统一形式的韧性断裂准则.通过编写用户材料子程序VUMAT,将韧性断裂准则嵌入到ABAQUS有限元软件的准静态算法主程序中,模拟了航空铝合金LY12CZ(Kt=...
关键词:
韧性金属材料
,
断裂
,
损伤累积
,
有限元分析
Zhongbing LUO
金属学报(英文版)
The tensile behavior of Sn-0.7Cu and Sn-0.7Cu-1Zn was compared at various deformation temperatures. Refined microstructure and γ-CuZn particles were discovered with Zn addition. The strengths of Zn-containing solder were higher than that of Sn-0.7Cu at room and subzero temperatures. Wi...
关键词:
Sn-0.7Cu
E.Bayraktar
,
F.Montembault
,
C.Bathias
材料科学技术（英文）
The study of microstructural network and damage mechanism of polymer and rubber, although deceptively simple, involves a complex interplay between material properties and service conditions. So, the study of the texture, deformation and the failure of rubber specimens are of considerable practical i...
关键词:
X-ray computed tomography
,
null
,
null
,
null
Gang FANG
,
Pan ZENG
材料科学技术（英文）
Based on rigid-plastic finite element method, a skew rolling process of stepped part is simulated. Considering nodesaving and effective remeshing, the tetrahedron solid elements are used to discrete workpiece. The workpiece material adopts rigid-plastic model, where the flow stress is function of ef...
关键词:
FEM
,
null
,
null
,
null
,
null
