Mechanical properties of rotary friction and gas tungsten arc welded aa6061 weldments subjected to equal channel angular pressing Mechanische Eigenschaften der reib- und wolframinertgasgeschweißten Aluminiumlegierung (AA6061) unter gleichmäßiger Winkelpressung

IF 1.2 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
M. Balasubramanian, N. Sadasivan
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引用次数: 0

Abstract

Metal joining can perhaps be said as one of the most indispensable manufacturing processes, with applications across a variety of engineering streams ranging from automobile to day-to-day construction activities. The conventional techniques primarily rely on melting the two joining surfaces and solidifying them to create a fresh cast joint. Though the plates being welded are wrought the joints inevitably are cast and hence result in heterogenous mechanical properties between the base metal. In alloy systems with eutectic phase, the high heat input involved in melting the joining surfaces often degrades the strength of the material in the vicinity of the weldment resulting in the formation of a heat-affected zone. In the welding of heat-treatable aluminium alloys, heat-affected zone degradation is often the weakest point of the welded sample The mechanical properties of a weldment can be improved by extensive plastic deformation. Studies show that such strengthening of AA6061 alloys is a combined influence of the grain refinement of the primary matrix as well as the redistribution of the secondary eutectic phase. Weldments fabricated by gas tungsten arc welding and rotary friction welding were subjected to severe plastic deformation, and the effects were studied. Improved mechanical properties thereby providing an alternative solution to post-weld heat treatment were observed.

Abstract Image

均匀角压下摩擦钨焊(AA6061)的机械性能
金属连接可以说是最不可或缺的制造工艺之一,应用于从汽车到日常建筑活动的各种工程流程。传统的技术主要依赖于熔化两个接合面并将其固化以创建一个新的铸造接合。虽然焊接板是锻造的,但接头不可避免地是铸造的,因此导致母材之间的力学性能不均匀。在具有共晶相的合金系统中,熔化连接表面所涉及的高热量输入通常会降低焊接件附近材料的强度,从而形成热影响区。在可热处理铝合金的焊接中,热影响区退化往往是焊接试样的最薄弱环节,广泛的塑性变形可以改善焊件的力学性能。研究表明,AA6061合金的这种强化是初生基体晶粒细化和次生共晶相再分布的综合影响。研究了钨极气体保护焊和旋转摩擦焊两种焊接工艺对焊接件的塑性变形影响。改善了机械性能,从而为焊后热处理提供了另一种解决方案。
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来源期刊
Materialwissenschaft und Werkstofftechnik
Materialwissenschaft und Werkstofftechnik 工程技术-材料科学:综合
CiteScore
2.10
自引率
9.10%
发文量
154
审稿时长
4-8 weeks
期刊介绍: Materialwissenschaft und Werkstofftechnik provides fundamental and practical information for those concerned with materials development, manufacture, and testing. Both technical and economic aspects are taken into consideration in order to facilitate choice of the material that best suits the purpose at hand. Review articles summarize new developments and offer fresh insight into the various aspects of the discipline. Recent results regarding material selection, use and testing are described in original articles, which also deal with failure treatment and investigation. Abstracts of new publications from other journals as well as lectures presented at meetings and reports about forthcoming events round off the journal.
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