Topic
Hardening (metallurgy)
About: Hardening (metallurgy) is a research topic. Over the lifetime, 25584 publications have been published within this topic receiving 376012 citations.
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TL;DR: In this article, the effect of laser parameters on the microstructure, and consequently, the wear resistance of laser surface engineered (hardening and melting) AISI H13 tool steel (in hardened and tempered condition) substrate is reported.
Abstract: The present study reports the effect of laser parameters on the microstructure, and consequently, the wear resistance of laser surface engineered (hardening and melting) AISI H13 tool steel (in hardened and tempered condition) substrate The microstructure of the laser surface hardened zone consists of ultrafine mixed carbides (M 23 C 6 , M 7 C 3 , MC or M 2 C) dispersed between martensite laths On the other hand, a laser surface melted microstructure comprises retained austenite, martensite, transformed ledeburite and fine carbides precipitated in the inter-dendritic zone Microhardness of the laser surface engineered zone is significantly enhanced to as high as 670–810 VHN as compared to 480–500 VHN of the as received quenched and tempered substrate and decreases along vertical depth from the surface until a narrow soft zone at the interface with a typical hardness of 440 VHN Laser surface melting yields a higher hardness level (770 ± 10 VHN) as compared to that after laser surface hardening (660 ± 10 VHN) Wear resistance of laser surface engineered samples (evaluated both by ball-on-disk and fretting wear testing equipments) shows a significant improvement as compared to that in hardened and tempered condition Due to an increased hardness, surface melting shows superior resistance to wear both under fretting as well as ball on disk wear testing conditions A marginal improvement in corrosion resistance was also recorded in laser surface engineered samples due to microstructural/compositional homogenization introduced by laser surface engineering
125 citations
TL;DR: In this paper, the effect of strain rate on the cyclic hardening behavior and the dislocation pattern of α-iron single crystals deformed at constant plastic strain amplitude at room temperature was investigated.
125 citations
TL;DR: In this paper, point defect hardening in binary B2 intermetallic compounds with the anti-structure defect structure (FeCo and AuZn) and the triple defect structures (NiAl, FeAl and CoAl) was investigated.
124 citations
TL;DR: In this article, the effect of ageing on mechanical properties and microstructural characteristics of a precipitation hardenable Al 7075 alloy subjected to rolling at liquid nitrogen temperature and room temperature is investigated.
124 citations
TL;DR: In this article, a deformation-based design approach called the continuous strength method (CSM) has been proposed for the design of stocky cross-sections, which relates the strength of a cross-section to its deformation capacity and employs a bi-linear (elastic, linear hardening) material model to account for strain hardening.
124 citations