Damage evolution on dynamic tensile fracture of ductile metals

Abstract The tensile test provides a relatively easy, inexpensive technique for developing mechanical property data for the selection, qualification, and utilization of metals and alloys in engineering service. The tensile test may require interpretation, and interpretation requires a knowledge of the factors that influence the test results. This chapter provides a metallurgical perspective for such interpretation. The topics covered include elastic behavior, an elasticity, damping, proportional limit, yield point, ultimate strength, toughness, ductility, strain hardening, yielding, and the onset of plasticity. The chapter describes the effects of grain-size on yielding, effect of cold work on the hardness and strength, and effects of temperature and strain-rate on the properties of metals and alloys. It provides information on true stress-strain relationships and special tests developed to measure the effects of test/specimen conditions. Finally, the chapter covers the characterization of tensile fracture of ductile metals and alloys.

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Critical Damage Evolution model for spall failure of ductile metals

Mechanics of Materials ◽

10.1016/j.mechmat.2012.10.004 ◽

2013 ◽

Vol 56 ◽

pp. 131-141 ◽

Cited By ~ 10

Author(s):

Yonggang Wang ◽

Hongliang He ◽

Lili Wang

Keyword(s):

Damage Evolution ◽

Evolution Model ◽

Ductile Metals ◽

Critical Damage ◽

Spall Failure

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Phenomenological modelling of tensile fracture in PE pipe by considering damage evolution

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2015.04.011 ◽

2015 ◽

Vol 77 ◽

pp. 72-82 ◽

Cited By ~ 11

Author(s):

Yi Zhang ◽

P.-Y. Ben Jar

Keyword(s):

Damage Evolution ◽

Tensile Fracture

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Quantitative damage evolution in dynamic incipiently failed Ti-6Al -4V

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:20009121 ◽

2000 ◽

Vol 10 (PR9) ◽

pp. Pr9-729-Pr9-734

Author(s):

D. A.S. Macdougall ◽

W. R. Thissell

Keyword(s):

Damage Evolution

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Microstructural and Mechanical Behaviour Evaluation of Mg-Al-Zn Alloy Friction Stir Welded Joint

International Journal of Automotive and Mechanical Engineering ◽

10.15282/ijame.17.3.2020.08.0612 ◽

2020 ◽

Vol 17 (3) ◽

pp. 8150-8159

Author(s):

Kulwant Singh ◽

Gurbhinder Singh ◽

Harmeet Singh

Keyword(s):

Heat Treatment ◽

Friction Stir Welding ◽

Magnesium Alloys ◽

Mechanical Performance ◽

Fuel Efficiency ◽

Research Work ◽

Grain Structure ◽

Tensile Fracture ◽

Friction Stir ◽

The Impact

The weight reduction concept is most effective to reduce the emissions of greenhouse gases from vehicles, which also improves fuel efficiency. Amongst lightweight materials, magnesium alloys are attractive to the automotive sector as a structural material. Welding feasibility of magnesium alloys acts as an influential role in its usage for lightweight prospects. Friction stir welding (FSW) is an appropriate technique as compared to other welding techniques to join magnesium alloys. Field of friction stir welding is emerging in the current scenario. The friction stir welding technique has been selected to weld AZ91 magnesium alloys in the current research work. The microstructure and mechanical characteristics of the produced FSW butt joints have been investigated. Further, the influence of post welding heat treatment (at 260 °C for 1 h) on these properties has also been examined. Post welding heat treatment (PWHT) resulted in the improvement of the grain structure of weld zones which affected the mechanical performance of the joints. After heat treatment, the tensile strength and elongation of the joint increased by 12.6 % and 31.9 % respectively. It is proven that after PWHT, the microhardness of the stir zone reduced and a comparatively smoothened microhardness profile of the FSW joint obtained. No considerable variation in the location of the tensile fracture was witnessed after PWHT. The results show that the impact toughness of the weld joints further decreases after post welding heat treatment.

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