Effect of Tungsten on Precipitation Formation and Performance of Fe-24Ni-14Cr-3Al-2.5Cu-0.5Nb Alloys at Elevated Temperature

被引：0

作者：

Qurashi, Muhammad Saqlain ^{[1
,2
]}

Habib, Muhammad ^{[3
]}

Khan, Afsar ^{[4
]}

Arif, Muhammad ^{[5
]}

Mansoor, Adil ^{[6
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

[2] Cent South Univ, Key Lab Nonferrous Met Mat Sci & Engn, Minist Educ, Changsha 410083, Peoples R China

[3] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

[4] Cent South Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China

[5] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China

[6] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China

来源：

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2025年 / 78卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Alumina-forming austenitic stainless steel; Tungsten effect; Laves phases; Precipitation nucleation; Tensile and passivation properties; AUSTENITIC STAINLESS-STEEL; CORROSION-RESISTANCE; CREEP-RESISTANT; OXIDATION RESISTANCE; MICROSTRUCTURE; ADDITIONS;

D O I：

10.1007/s12666-024-03536-0

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Prolonged aging can lead to detrimental precipitation in alumina-forming austenitic stainless steels (AFAs). This study investigates the Fe-24Ni-14Cr-3Al-2.5Cu-0.5Nb (AFA) alloy at 710 degrees C with and without tungsten (W). Microstructural analysis revealed NbC formation after homogenization at 1260 degrees C for 7 h. Aging at 710 degrees C showed that the W-free alloy developed both NbC and L12-ordered Ni-Cu-Al phases, while the W-containing alloy exhibited smaller Ni-Cu-Al phases. After 2200 h, the W-free alloy showed delta-ferrite and Laves-Fe2Nb phases, whereas the W-alloy developed Laves-Fe2W and B2-NiAl phases in greater amounts. This phase formation suppressed the detrimental delta-ferrite network and enhanced room temperature tensile and corrosion properties. The nucleation of Fe2W at grain boundary junctions reduced stress concentration, improving ductility and passivation strength in the W-containing steel.

引用

页数：13

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