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Alloy design strategies to increase strength and its trade-offs together
Progress in Materials Science ( IF 37.4 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.pmatsci.2020.100720
Seung Zeon Han , Eun-Ae Choi , Sung Hwan Lim , Sangshik Kim , Jehyun Lee

Abstract It is an ultimate goal for almost all the metallurgists to improve strength, ductility, formability and conductivity of metal together. However, ductility, formability and conductivity are generally known as the trade-offs for the increase in strength. It is because the mechanism(s) to increase the strength of metal is subject to be either harmful or irrelevant to those related to the trade-offs. A variety of metallurgical methods for improving both strength and trade-offs have been exploited through the morphological control of microstructure. This article addresses the microstructural aspects of strengthening a metal together with improving its trade-off properties of ductility, formability and conductivity. Particular emphasis was placed on the alloy design to control the interface energy between 2nd phases and alloy matrix. The reduction of interfacial energy between second phase and matrix can, for example, induce the uniform dispersion of ultra-fine second phase in a matrix, thereby increasing strength, conductivity and ductility simultaneously. The utilization of mechanically detrimental discontinuous precipitation is described as a method of improving the strength, ductility and conductivity of precipitation hardened alloys.

中文翻译:

合金设计策略以增加强度及其权衡

摘要 共同提高金属的强度、延展性、成形性和导电性是几乎所有冶金学家的终极目标。然而,延展性、成型性和导电性通常被认为是增加强度的权衡。这是因为增加金属强度的机制要么是有害的,要么是与权衡相关的机制无关。通过微观结构的形态控制,已经开发了各种用于提高强度和权衡的冶金方法。本文讨论了强化金属的微观结构方面,以及改善其延展性、成形性和导电性的权衡特性。特别强调合金设计以控制第二相和合金基体之间的界面能。例如,第二相和基体之间界面能的降低可以引起超细第二相在基体中的均匀分散,从而同时提高强度、导电性和延展性。对机械有害的不连续沉淀的利用被描述为一种提高沉淀硬化合金的强度、延展性和导电性的方法。
更新日期:2020-08-01
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