Abdulla I. Almazrouee

• Ph D.
• Professor at Public Authority for Applied Education and Training, College of Technological Studies

Friction stir processing (FSP) is a green fabrication technique that has been effectively adopted in various engineering applications. One of the promising advantages of FSP is its applicability in the development of surface composites. In the current work, a new approach for direct friction stir processing is considered for the surface fabrication...

Electrical generation forecasting is essential for management and policymakers due to the crucial data provided for resource planning. This research employs the Prophet model with single and multiple regressors to forecast the electricity generation in Kuwait from 2020 to 2030. In addition, multiple seasonality Holt-Winters models were utilized as...

The rapidly increasing population growth and expansion of urban development are undoubtedly two of the main reasons for increasing global energy consumption. Accurate long-term forecasting of peak load is essential for saving time and money for countries' power generation utilities. This paper introduces the first investigation into the performance...

The state of Kuwait is facing a substantial challenge in responding to the spread of the novel coronavirus 2019 (COVID-19). The government’s decision to repatriate stranded citizens back to Kuwait from various COVID-19 epicenters has generated a great concern. It has heightened the need for prediction models to estimate the epidemic size. Mathemati...

Tests are conducted to evaluate the effect of long‐term storage on the microstructure and microhardness of an oxygen‐free high conductivity (OFHC) copper after processing by high‐pressure torsion (HPT) for various numbers of revolutions at ambient temperature. Results are presented for samples subjected to storage at room temperature through period...

X20CrMoV12-1 steel is one of the most common martensitic steel grades that is known for its excellent heat-resistant and superior performance against oxidation and creep. Consequently, it has been used as a replacement for the low-alloy ferritic 2.25Cr-1Mo steel reheater pipes in a desalination power plant. Fracture occurred unexpectedly in some X2...

Early published results have demonstrated that high purity Cu and a Pb-62% Sn alloy exhibit very different behaviour during high-pressure torsion (HPT) processing at room temperature and subsequent room temperature storage. High purity Cu showed strain hardening behaviour with a refined grain structure during HPT processing whereas a Pb-62% Sn allo...

The effect of the initial annealing temperature on the evolution of microstructure and microhardness in high purity OFHC Cu is investigated after processing by HPT. Disks of Cu are annealed for 1 h at two different annealing temperatures, 400 and 800 °C, and then processed by HPT at room temperature under a pressure of 6.0 GPa for 1/4, 1/2, 1, 5, a...

Disks of an Al-6061 metal matrix composite, reinforced with 10 vol.% Al2O3 particles, were processed by high-pressure torsion (HPT) at room temperature for 1/4, 1/2, 1, 5 and 10 turns under an applied pressure of 6.0 GPa. The evolution of microstructure was investigated using optical microscopy and scanning electron microscopy. During HPT processin...

High purity copper was processed by high-pressure torsion (HPT) at room temperature and then stored at room temperature for periods of up to 6 weeks to investigate the effect of self-annealing. Hardness measurements were recorded both at 48 h after HPT processing and after various storage times. The results show the occurrence of recovery near the...

An ultra-high purity oxygen free high conductivity (OFHC) Cu was investigated to determine the evolution of microstructure and microhardness during processing by high-pressure torsion (HPT). Disks were processed at ambient temperature, the microstructures were observed at the center, mid-radius and near-edge positions and the Vickers microhardness...

This paper describes a method developed to schedule the preventive maintenance tasks of the generation and desalination units in separate and linked cogeneration plants provided that all the necessary maintenance and production constraints are satisfied. The proposed methodology is used to generate two preventing maintenance schedules, one for elec...

Abstract The effect of overlapping between consecutive passes of Friction Stir Processing (FSP) was examined on the microstructure, microtexture, and mechanical properties of Al 6063. FSP was carried out at three overlapping (OL) percentages, i.e. 25, 50, and 75, and at constant rotational and traverse speeds of the FSP tool. Microstructural analys...

Cobalt-based alloys of the Stellite family are used as hardfacing for sealing surfaces of valves operating in desalination and power plants because of their excellent low friction and anti-galling properties in high-load sliding contact under the prevailing conditions. However, insufficient control of pressure and temperature during operation can d...

The evolution of microstructure and microtexture in high purity copper was examined after processing by high-pressure torsion (HPT). Copper disks were annealed for 1 h at 800 °C and later processed monotonously in HPT at ambient temperature for 1/4, 1/2, 1, and 5 turns under a pressure of 6.0 GPa. Electron backscattered diffraction (EBSD) measureme...

The purpose of this paper is to study the effect of high nitrogen content on corrosion behavior of austenitic stainless steels in seawater under severe conditions such as tensile stresses and existence of sensitization in the structure. A constant tensile stress has been applied to sensitized specimens types 304, 316L, 304LN, 304NH, and 316NH stain...

Failure analysis investigation was carried out on a ruptured primary superheater tube of a boiler unit in a power plant. The rupture of 1Cr–0.5Mo steel tube had caused steam leakage and led to boiler shutdown after only 17,520h of operation. The physical and mechanical characteristics of the alloy and the oxide scales in the area of failure were ch...

Oxide scale thickness measurements are used in assessing the life of different components operating at high temperature environment. Such measurements provide an approximation for the temperature inside components such as reheater and superheater tubes. A number of failures were encountered in one of the boilers in one of Kuwaiti power plants. Thes...

Welding parameters have direct effects on the bead geometry, microstructure, and mechanical properties of low alloy steels. A series of experiments have been carried out to examine some of these parameters using the flux cored arc welding process (FCAW). In this article, an experimental study was conducted to investigate the influence of welding pa...

Coated carbide inserts are considered vital components in machining processes and advanced functional surface integrity of inserts and their coating are decisive factors for tool life. Atomic Force Microscopy (AFM) implementation has gained acceptance over a wide spectrum of research and science applications. When used in a proper systematic manner...

Coated tool inserts can be considered as the backbone of machining processes due to their wear and heat resistance. However, defects of coating can degrade the integrity of these inserts and the number of these defects should be minimized or eliminated if possible. Recently, the advancement of coating processes and analytical tools open a new era f...

Petroleum refineries and power plants seek to extend the life of their aging components through weld repairs. Some of the repairs require stress relieving using post weld heat treatment (PWHT). However, PWHT is a cost and time consuming process. This paper provides a brief description of different alternative techniques for PWHT: half-bead welding,...

The use of the half-bead, temper bead welding (TBW), and cold repair techniques is proving to reduce the cost of repairs and extend the life of aged components in power plants, petrochemical and hydrocarbon processing industries. It has been a significant area of interest for more than twenty years. A critical factor in this context is residual str...

Oxide scale growth kinetics of 1.25Cr-0.5Mo and 2.25Cr-1Mo steels have been investigated and oxide scales have been characterized. In spite of the considerable difference in chromium contents of the two steels, their oxidation kinetics have been found to be similar. The similarity in oxidation behavior has been associated with formation of a protec...

Oxide scale growth kinetics of 1.25Cr-0.5Mo and 2.25Cr-1Mo steels have been investigated and oxide scales have been characterized. In spite of the considerable difference in chromium contents of the two steels, their oxidation kinetics have been found to be similar. The similarity in oxidation behavior has been associated with formation of a protec...

Use of accelerated creep rupture testing to assess the remaining life of components operating at elevated temperatures, such as pipes and tubes, is a common practice. At high temperatures, oxide growth can affect the creep results by diameter reduction and thus can increase the stress. However, the nature of oxide layer and hence oxidation behavior...

Accelerated creep rupture testing is used to aid in assessing the remaining life for components such as pipes and tubes used in high temerature plants. At the high temperatures, oxide growth can affect the creep results by diameter reduction and, thus, increase the stress. This paper includes the study of oxide-scale growth and diameter reduction k...

Welding of ‘chromium–molybdenum’ ferritic steels often causes steep modifications in the microstructure of the weld heat affected zone (HAZ). The paper presents results to establish the role of such microstructural variations on inhomogeneous scaling across the weldments of 2.25Cr–1Mo and 9Cr–1Mo steels, as well as further degradation in microstruc...

Accelerated Rupture Testing is used to aid in assessing the remaining life for components such as pipes and tubes used in high temperature plants. Due to the high temperature nature of the test, oxide growth plays a role in affecting the test by enhancing the stress. This paper includes the study of oxide-scale growth and metal loss kinetics during...