Application of-140 degrees C Sub-Zero Treatment For Cr-V Ledeburitic Steel Service Performance Improvement

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F19%3A00504335" target="_blank" >RIV/68081723:_____/19:00504335 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/19:00331700 RIV/00216305:26210/19:PU136298

Výsledek na webu

<a href="https://link.springer.com/article/10.1007%2Fs11661-019-05180-6" target="_blank" >https://link.springer.com/article/10.1007%2Fs11661-019-05180-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11661-019-05180-6" target="_blank" >10.1007/s11661-019-05180-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Application of-140 degrees C Sub-Zero Treatment For Cr-V Ledeburitic Steel Service Performance Improvement

Popis výsledku v původním jazyce

The effect of -140 degrees C, 17-hour sub-zero treatment and subsequent tempering on the hardness, flexural strength, and fracture toughness of Cr-V ledeburitic steel was investigated. The main purpose was to highlight the role of microstructural alterations, such as a decrease of the retained austenite content, the quantitative parameters of carbide distributions, or others, due to applied treatments. Compared to conventional treatments, the applied sub-zero treatment improves the hardness of the material significantly within the whole range of tempering temperatures used. The hardness enhancement is in the range from 197 to 137 HV10 for tempering at 170 degrees C to 450 degrees C. The flexural strength is slightly improved at low tempering conditions up to 170 degrees C, while there is almost no effect of the sub-zero treatment on flexural strength for higher tempering temperatures. The fracture toughness is substantially improved (by about 3 MPam(1/2)) in the untempered state as well as after high-temperature tempering. The fracture toughness is slightly worsened, by about 0.15 to 1 MPam(1/2), within the 170 degrees C to 450 degrees C range of tempering temperatures. These changes in fracture toughness are reached with a significant increase of hardness. This steel performance is associated with enhanced fracture surface roughness and an increased ductile microvoid coalescence micromechanism presence in fracture surfaces. The results also show that treatment at -140 degrees C leads to a greater enhancement of the complex of mechanical properties than can be obtained by soaking the samples in liquid nitrogen.

Název v anglickém jazyce

Application of-140 degrees C Sub-Zero Treatment For Cr-V Ledeburitic Steel Service Performance Improvement

Popis výsledku anglicky

The effect of -140 degrees C, 17-hour sub-zero treatment and subsequent tempering on the hardness, flexural strength, and fracture toughness of Cr-V ledeburitic steel was investigated. The main purpose was to highlight the role of microstructural alterations, such as a decrease of the retained austenite content, the quantitative parameters of carbide distributions, or others, due to applied treatments. Compared to conventional treatments, the applied sub-zero treatment improves the hardness of the material significantly within the whole range of tempering temperatures used. The hardness enhancement is in the range from 197 to 137 HV10 for tempering at 170 degrees C to 450 degrees C. The flexural strength is slightly improved at low tempering conditions up to 170 degrees C, while there is almost no effect of the sub-zero treatment on flexural strength for higher tempering temperatures. The fracture toughness is substantially improved (by about 3 MPam(1/2)) in the untempered state as well as after high-temperature tempering. The fracture toughness is slightly worsened, by about 0.15 to 1 MPam(1/2), within the 170 degrees C to 450 degrees C range of tempering temperatures. These changes in fracture toughness are reached with a significant increase of hardness. This steel performance is associated with enhanced fracture surface roughness and an increased ductile microvoid coalescence micromechanism presence in fracture surfaces. The results also show that treatment at -140 degrees C leads to a greater enhancement of the complex of mechanical properties than can be obtained by soaking the samples in liquid nitrogen.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/FV10385" target="_blank" >FV10385: Pokročilé technologie výroby oběžných kol</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Metallurgical and Materials Transactions A

ISSN

1073-5623

e-ISSN

—

Svazek periodika

50A

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

22

Strana od-do

2413-2434

Kód UT WoS článku

000463991300030

EID výsledku v databázi Scopus

2-s2.0-85063979168