Experimental evaluation of fracture properties of aluminum alloy 1050-H14 by small punch test

IF 0.4 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Strength Fracture and Complexity Pub Date : 2023-05-22 DOI:10.3233/sfc-230003

The Yen Doan, H. Pham, Khai Quang Le, Thi-Hang-Nga Nguyen, Vinh Van Nghiem

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Abstract

Although ductile fracture properties of aluminum alloy have been examined by several research works, the effect of strain rate in small punch test is still unclear. An investigation on rate sensitivity of fracture mechanical characteristics of aluminum alloy in small punch test is necessary. In the present study, an experimental investigation of small punch test is performed at different deformation rate in quasi-static test for aluminum alloy 1050-H14. The strain-rate sensitivity of fracture properties are discussed based on the force-deflection curve as well as observation of fracture surface of deformed specimen after testing. The obtained results show that the material possesses a positive rate-sensitivity in the investigated range of displacement rate from 0.48 to 1.26 mm/min. The necking appears in a small region due to inhomogeneous deformation in the direction of cross-section at lower deformation rate. In the case of higher rate of deformation, more uniform deformation in the direction of cross-section and the local ductile fracture with more dimples can be observed.

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1050-H14铝合金断裂性能的小冲孔试验评价

尽管几项研究工作已经检验了铝合金的韧性断裂性能，但应变速率在小冲孔试验中的影响仍然不清楚。在小冲裁试验中对铝合金断裂力学特性的速率敏感性进行研究是必要的。在本研究中，对1050-H14铝合金准静态试验中不同变形率下的小冲孔试验进行了实验研究。根据力-挠度曲线以及试验后变形试样的断口观察，讨论了断裂性能的应变速率敏感性。结果表明，该材料在0.48-1.26mm/min的位移速率范围内具有正的速率敏感性。在较低的变形速率下，由于在横截面方向上的不均匀变形，颈缩出现在较小的区域。在变形率较高的情况下，可以观察到在横截面方向上更均匀的变形和具有更多凹坑的局部韧性断裂。

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来源期刊

Strength Fracture and Complexity MATERIALS SCIENCE, CHARACTERIZATION & TESTING-

CiteScore

1.30

自引率

0.00%

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期刊介绍： Strength, Fracture and Complexity: An International Journal is devoted to solve the strength and fracture unifiedly in non linear and systematised manner as complexity system. An attempt is welcome to challenge to get the clue to a new paradigm or to studies by fusing nano, meso microstructural, continuum and large scaling approach. The concept, theoretical and/or experimental, respectively are/is welcome. On the other hand the presentation of the knowledge-based data for the aims is welcome, being useful for the knowledge-based accumulation. Also, deformation and fracture in geophysics and geotechnology may be another one of interesting subjects, for instance, in relation to earthquake science and engineering.