The simulation researches on hot extrusion of super-fined tube made of magnesium alloys

Huang, Hongjun; Zhai, Z. Y.; Li, Y. Y.; Gong, Xue; Wang, H.; Fan, J.-Z.

doi:10.3103/s1067821215020066

Cited by 1 publication

(2 citation statements)

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“…The crystalline structure of the specimens were made visible by etching using solution containing 5% Cupric cloride, 8% HCl acid and 87% methylated spirit on the polished surfaces. Microscopic examination of the etched surface of various specimens was undertaken using a metallurgical microscope with an inbuilt camera through which the resulting microstructure of the samples were all photographically recorded with magnification of 400 [11,12].…”

Section: Microstructure Examinationmentioning

confidence: 99%

“…It was observed that there was many short graphite flakes surrounded with patches of uniformly distributed pearlite grains as seen in Figure 8. Figure 9 shows the massive martensite structure of hardened sample, when medium carbon steels are rapidly quenched from its austenite temperature to room temperature, the austenite will decompose into a mixture of some medium carbon martensite and fewer pearlite as a result of this microstructure which is hard, hence, there was increase in tensile strength, hardness and reduction in ductility of the material (Figure 10) [11].…”

Section: Effect Of Heat Treatment On Microstructurementioning

confidence: 99%

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Analysis of Mechanical Behavior and Microstructural Characteristics Change of ASTM A-36 Steel Applying Various Heat Treatment

Mf¹

2016

J Material Sci Eng

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In this study ASTM A-36 (mild steel) is selected as specimen for testing various mechanical properties and microstructure change. The effects of heat treatment on the mechanical properties and microstructure characteristics change of selected specimen are analyzed. Annealing, hardening and tempering are the most important heat treatment processes often used to change mechanical properties of engineering materials. The purpose of heat treating is to analyze the mechanical properties of the steel, usually ductility, hardness, Yield strength, tensile strength and impact resistance. The heat treatment develops hardness, softness, and improves the mechanical properties such as tensile strength, yield strength, ductility, corrosion resistance and creep rupture. These processes also help to improve machining effect, and make them versatile. The mechanical properties can easily be modified by heat treating to suit a particular design purpose. In the present study, selected samples are heat-treated at certain temperature above the austenitic region and quenched in order to investigate the effect on the mechanical properties microstructure of the mild steel. The changes in mechanical behavior and microstructure as compared with unquenched samples are explained in terms of changes in tensile strength. Results showed that the mechanical properties of mild steel can be changed and improved by various heat treatments for a particular application.

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Section: Microstructure Examinationmentioning

confidence: 99%

Section: Effect Of Heat Treatment On Microstructurementioning

confidence: 99%