In the present study, an attempt has been made to develop and characterize natural fiber-based composites (jute/epoxy, hemp/epoxy, flax/epoxy) their hybrid (jute/hemp/epoxy, hemp/flax/epoxy, jute/hemp/flax/epoxy) using hand-lay-up technique. Mechanical characterization (tensile, flexural, impact, hardness test) of developed was performed. The interface between fiber matrix examined scan electron microscopy (SEM). Among flax/epoxy), flax/epoxy composite shown higher (98 Shore-D) tensile...

In this paper we analyze the complexity of algorithms for two problems that arise in automatic test path generation programs: problem building a through specified set program statements and which satisfies impossible-pairs restrictions on statement pairs. These are both reduced to graph traversal problems. We give an efficient algorithm first, show second is NP-complete.

In the present study, moisture uptake behavior and their effect on mechanical properties of plant fibers were investigated while these reinforced with epoxy matrix. The developed composites dipped in tap water for a span 12 months at room temperature. Hardness (shore-D), tensile, flexural evaluated after 1 year immersion samples compared that dry specimens. Water saturated jute/hemp/epoxy composite specimen showed highest reduction tensile strength young's modulus by 46.9% 51.8%,...

Aluminium matrix surface composites are gaining alluring role especially in aerospace, defence, and marine industries. Friction stir processing (FSP) is a promising novel solid state technique for fabrication. In this study, AA6061/SiC were fabricated the effect of tool plunge depth on pattern reinforcement particles dispersion metal was investigated. Six varying depths chosen at constant levels shoulder diameter tilt angle to observe exclusive variation. Process parameters experimentation...

Abstract Electrical discharge machining (EDM) is a well-established modern process used to manufacture geometrically complex shapes, hard materials that are extremely difficult machine by conventional processes. This noncontact technique continuously emerging from mere tool and dies making microscale applications. In recent years, researches have emphasized on increasing performance coupled with deliberate surface treatments. Additive mixed electrical (AEDM) novel innovation for enhancing...

Additive mixed electric discharge machining (AEDM) is a recent innovation for enhancing the capabilities of electrical process. The objective present research work to study influence operating process input parameters on characteristics nickel-based super alloy (Inconel 718) in aluminium AEDM with copper electrode. effectiveness Inconel evaluated terms material removal rate (MRR), surface roughness (SR), and wear ratio (WR) using one variable at time (OVAT) approach. It found experimentally...

In this article, a technique for optimization of abrasive mixed electrical discharge machining (AEDM) process with multiple performance characteristics based on the orthogonal array grey relational analysis has been studied. The input parameters, i.e., concentration silicon powder in dielectric fluid, peak current, pulse-on time, and duty factor, were chosen to study form MRR surface roughness. research outcome identifies significant parameters their effect EN-24 tool steel using copper...

Fabrication of metal matrix surface composites (SCs) is an emerging trend friction stir processing applications. Key factors affecting the properties SCs are process parameters, tool geometry, dimensions and reinforcement strategies. In this research, effects different strategies varying offset positions on dispersion particles in base investigated. The experiments were performed two phases using AA6063 as at constant parameters 1120 rpm rotational speed, 40 mm/min traverse speed 2.5° tilt...

Surface composites were fabricated on AA6063-T6 base metal using silicon carbide (SiC) reinforcement particles by friction stir processing (FSP). Influence of multiple FSP passes was investigated the SiC particle distribution, processed zone dimensions, and microhardness composites. The rotational speed, traverse tool tilt kept constant numbers varied at 2, 4, 6, 8. distribution in analyzed OM SEM, while evaluated Vickers indentation test. results reveal that with increase there is...

This study presents microstructural and mechanical investigation on friction stir welding of composites fabricated through processing a high strength Al–Zn–Mg–Cu alloy by utilizing hybrid reinforcement. Surface (SCs) were via FSP, sliced to the processed thickness cut-apart longitudinal axis SCs. They subsequently; butt welded employing varied tool rpm (560–900 rpm). The properties, analysis micro-hardness profile was obtained for welds. Results revealed that in comparison SC samples...