A study of strengthening mechanisms in tempered martensite from a medium carbon steel

1972 ◽  
Vol 3 (6) ◽  
pp. 1403-1406 ◽  
Author(s):  
L. Malik ◽  
J. A. Lund
Keyword(s):  
Carbon Steel ◽  
Medium Carbon Steel ◽  
Strengthening Mechanisms ◽  
Tempered Martensite ◽  
Medium Carbon

The Combined Effects of Notches and Microstructure on the Performance of Medium Carbon Steel Breakaway Couplings

1994 ◽  
Vol 116 (1) ◽  
pp. 80-84
Author(s):  
D. P. Henkel ◽  
A. W. Pense
Keyword(s):  
Carbon Steel ◽  
Medium Carbon Steel ◽  
Structural Performance ◽  
Strength Increase ◽  
Combined Effects ◽  
Tempered Martensite ◽  
Average Strength ◽  
Medium Carbon ◽  
Aisi 4130 ◽  
Circumferential Notch

Combined effects of notches and microstructure on the structural performance of medium carbon steel breakaway couplings were discussed. Property troughs commonly associated with tempered martensite embrittlement were characterized as a function of temper for AISI 4130 and 4140 steel couplings. It was observed that a circumferential notch could change the fracture mode from ductile to brittle with no change in tempering condition. Notch-strengthening, a second significant effect, was also observed in similar couplings with an average strength increase of thirty percent. A critical assessment was made of the AASHTO specifications on breakaway couplings used for highway structures and of their interpretation by individual states.

scholarly journals Wear Resistance of Medium Carbon Steel with Different Microstructures

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2015
Author(s):  
Xue Han ◽  
Zhenpu Zhang ◽  
Gary C. Barber ◽  
Steven J. Thrush ◽  
Xin Li
Keyword(s):  
Wear Resistance ◽  
Carbon Steel ◽  
Tribological Performance ◽  
Medium Carbon Steel ◽  
Tempered Martensite ◽  
Medium Carbon ◽  
Debris Particles ◽  
Quenched And Tempered Steel ◽  
Bainite Microstructure ◽  
Martensite Microstructure

In this research, the tribological properties of different microstructures of medium carbon steel produced by either an austempered process or quenched-tempered process are investigated. The as-received samples with annealed microstructure (spherodized) are austempered to obtain a bainite microstructure or quenched-tempered to obtain a tempered martensite microstructure. The tribological performance of these microstructures was studied using a ball-on-disk UMT3 tribometer. The results indicated that both bainite microstructures and tempered-martensite microstructures produced better wear resistance than pearlite microstructures. At the same hardness level, the austempered disk specimens have less cracking due to higher fracture toughness compared to quenched and tempered steel. For the disks, tempered martensite microstructures produced more plastic deformation compared with bainite microstructures. Mild abrasive wear was observed on the harder disks, however, smearing wear was observed on the softer disks. Adhered debris particles were observed on the balls.

INFLUENCE THE QUENCHING AND TEMPERING ON THE MICROSTRUCTURE, MECHANICAL PROPERTIES AND SURFACE ROUGHNESS, OF MEDIUM CARBON STEEL

2018 ◽  
Vol 18 (1) ◽  
pp. 125-135
Author(s):  
Sattar H A Alfatlawi
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Surface Roughness ◽  
Carbon Steel ◽  
Cold Water ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Heating And Cooling ◽  
Treatment Processes ◽  
Quenching And Tempering

One of ways to improve properties of materials without changing the product shape toobtain the desired engineering applications is heating and cooling under effect of controlledsequence of heat treatment. The main aim of this study was to investigate the effect ofheating and cooling on the surface roughness, microstructure and some selected propertiessuch as the hardness and impact strength of Medium Carbon Steel which treated at differenttypes of heat treatment processes. Heat treatment achieved in this work was respectively,heating, quenching and tempering. The specimens were heated to 850°C and left for 45minutes inside the furnace as a holding time at that temperature, then quenching process wasperformed in four types of quenching media (still air, cold water (2°C), oil and polymersolution), respectively. Thereafter, the samples were tempered at 200°C, 400°C, and 600°Cwith one hour as a soaking time for each temperature, then were all cooled by still air. Whenthe heat treatment process was completed, the surface roughness, hardness, impact strengthand microstructure tests were performed. The results showed a change and clearimprovement of surface roughness, mechanical properties and microstructure afterquenching was achieved, as well as the change that took place due to the increasingtoughness and ductility by reducing of brittleness of samples.

AISI 1025

Alloy Digest ◽  
1972 ◽  
Vol 21 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Carbon Steel ◽  
Physical Properties ◽  
Heat Treating ◽  
General Purpose ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Steel Mills ◽  
Cold Worked

Abstract AISI 1025 is a low-to-medium-carbon steel used in the hot-worked, cold-worked, normalized or water-quenched-and-tempered condition for general-purpose construction and engineering. It is also used for case-hardened components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: CS-47. Producer or source: Carbon and alloy steel mills.

Sign in / Sign up

Export Citation Format

Share Document