搜索结果: 1-9 共查到“材料科学基础学科 ECAP”相关记录9条 . 查询时间(0.109 秒)
ECAP methods application on selected non-ferrous metals and alloys
Metallic alloys ECAP method Mechanical properties Microstructure
2010/8/17
In many technical processes of forming the deformation is substantially greater than conditions at the tensile test. In this case a torsion tests have already been used for a long time at investigatio...
Increase of efficiency of the ECAP technology at grain refinement of the alloy AlMn1Cu
ECAP process Mathematical simulation Channel geometry
2009/12/2
Purpose: The foundation of the resolved problem consists of verification of influence of temperature and also
geometry of the ECAP tool on obtaining of required amount of deformation which substantia...
Influence of ECAP technology on the metal structures and properties
Nanomaterials ECAP Microstructure Mechanical properties
2009/12/1
Purpose: The purpose of the paper is the verification of functionality of the ECAP technology at extrusion of the
copper, alluminium alloys, magnesium alloys and steel.
Design/methodology/approach: ...
ECAP变形下304L奥氏体不锈钢的形变诱导马氏体相变
奥氏体不锈钢 等通道转角挤压 亚微米晶
2009/10/15
研究了304L奥氏体不锈钢在严重塑性变形(等通道转角挤压, ECAP)下发生形变诱导马氏体转变的微观特征, 包括形核特征、长大方式和相变晶体学, 探讨了粗大晶粒和亚微米晶粒发生马氏体相变的异同和微观机理. 结果表明: 粗大奥氏体晶粒发生相变时, 马氏体主要形核于微观剪切带(包括层错、变形孪晶和ε相等)的相互交割处, 马氏体与奥氏体之间为K---S(Kurduumov---Sachs)关系, 而不是...
ECAP对纯铝拉伸性能和断裂行为影响的研究
等通道转角挤压(ECAP) 位错 断裂机制
2013/10/8
利用等通道转角挤压(ECAP)对纯铝进行了连续的挤压,结合位错及断口形貌,分析了位错强化及断裂机制.结果表明,剪切变形使位错滑移,晶粒细化,挤压4道次后材料屈服强度、抗拉强度分别较初始态提高了38.5%和24.0%,断裂机制呈现典型的沿晶断裂特征.
室温ECAP和冷轧复合变形工业纯钛的组织和性能
金属材料 ECAP 冷轧 工业纯钛
2009/2/8
采用ECAP技术和常规冷轧复合变形工艺制备了高强度工业纯钛,研究了复合变形后试样的力学性能与显微组织的关系. 结果表明,工业纯钛经室温单道次ECAP和冷轧复合变形后, 晶粒被严重拉长, 形成了明显的纤维状组织,试样的抗拉强度高达805 MPa; 随着冷轧变形量的增大, 变形组织的细化程度和均匀性提高,使试样的强度和塑性进一步提高. 位错滑移和孪生是工业纯钛室温ECAP和冷轧复合变形的主要变形机制....
使用DEFORM-3D软件模拟等通道转角挤压过程中外转角半径及背压对纯钛应力和应变分布的影响，探讨不同 R值对材料流动的影响规律。结果显示：当R = 6 mm时，工件上下表面应力状况较为平衡，从而得到均匀的等效应变分布；当R＜6 mm时，在外转角形成的死区使材料之间相互搓动，导致工件底部区域出现剧烈畸变，工件不同区域之间的等效应变量差别较大；当R＞6 mm时，工件上表面与模具内转角之间的相互作用力...
The structure of austenitic steel AISI 316 after ECAP and low-cycle fatigue
Structure Low-cycle fatigue Steel AISI 316
2010/2/4
Purpose: The article presents results of investigation of structure and properties of austenitic steel grade AISI 316 after application of Equal Channel Angular Pressing (ECAP) at the temperature of a...