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.
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页数：13
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