Influence of Solid Solution Treatment on the Mechanical Properties of A286 Stainless Steels

Seol, Jae Bok; Choi*, Jae Won; Kim, Jeoung Han

doi:10.1166/sam.2016.2849

Cited by 6 publications

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“…The dark grey phases are TiC ceramic-particles, which grew in a face centered cubic structure, space group Fm3m and lattice parameter α = 4.32Å which is coherent with austenitic matrix. Cellular structures on grain boundaries are hcp eta (D024 (ⴄ-Ni3Ti)phases on basal (0001) plane which are incoherent with both TiC and austenitic matrix of the alloy [10,13]. Figure4 shows the tensile behavior of the aged A286 alloys tested at room temperature.…”

Section: Resultsmentioning

confidence: 99%

Carbon and Titanium Effect on Tensile Behavior of Aged A286 Nickel-Iron Based Superalloy

Ali,

Qurashi,

Lartey

et al. 2023

KEM

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A286 nickel-iron based superalloy used in high temperature applications. Age hardening is done to enhance the creep behavior which is much affected by TiC and eta (ⴄ (Ni3Ti)) phases. Effect of carbon and titanium (0.02C-2.46Ti, 0.04C-2.54Ti, 0.05C-2.58Ti, and 0.06C-2.62Ti) on tensile behavior of aged A286 superalloy is systematically investigated via TiC and ⴄ (Ni3Ti) phases. It has been revealed that carbon and titanium contents are in proportional to nucleation of TiC and eta phases in the austenitic matrix of this alloy. Precipitation of these phases enhanced yield strength from 354MPa to 501MPa and ultimate tensile strength (UTS) 543MPa to 651MPa. However, plasticity decreased nearly 4%. Fracture topography showed that the ductile transgranular fracture in low C-Ti alloys are due to TiC particles, whereas in high C-Ti alloys fracture nature is found brittle intergranular due to eta phases.

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Section: Resultsmentioning

confidence: 99%

Carbon and Titanium Effect on Tensile Behavior of Aged A286 Nickel-Iron Based Superalloy

Ali,

Qurashi,

Lartey

et al. 2023

KEM

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show abstract

“…Based on the SADP, the spots of precipitates corresponded to the η ‐phase [Ni 3 Ti:hcp, D024 type]. [ 25,26 ] TEM image in Figure 8b with SADP clearly presented that these phases are of different crystal structures, which are coexisting.…”

Section: Resultsmentioning

confidence: 99%

Effect of Carbon and Titanium Variations in Fe‐Based Heat‐Resistant Superalloy A286 on TiC and η Phase Formation

Qurashi

Zhao

Chen

et al. 2022

steel research int.

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A286 super austenitic stainless steel is a kind of superalloy containing large amounts of Ni and Cr and small amounts of Ti (1-3%), C (0-0.06%), Al (0.1-0.3%), Mn (0.5-1.5%), and Co (0-0.5). [1] Similar to Ni-based superalloys in microstructure, this alloy is strengthened by age-hardening. As a heat-resistant superalloy, it has been designed for applications requiring sufficiently high creep fracture strength and excellent fatigue resistance at temperatures as high as 700 C. Typical areas of applications include aircraft engines, turbine wheels and blades, fasteners and springs, etc. [2][3][4][5][6] In this alloy, eta (η) Ni 3 Ti hcp phase is a stable phase which is formed from the dissolution of γ 0 phase [7][8][9] at aging temperatures in the range of 600 850 C. [10][11][12][13] Some researchers stated that during prolonged hotworking above 720 C, η phase can easily precipitate at grain boundaries from the fcc austenitic matrix, [14] which can have a direct influence on the creep behavior of the alloys. [15,16] Depending on the chemical composition and heat treatment conditions, η and carbide phases precipitate simultaneously or sequentially in this alloy system.Many efforts have been made by researchers to find a suitable composition which can enhance the strengthening mechanism by proper control of eta (η) phases up to some extent at high temperature by the addition of alloying elements. Finding a suitable ratio of constituent elements, especially Ti and Al, is required to give the highest strengthening effect at higher temperature works for a long time. [8][9][10][11][12][13][15][16][17][18] Moreover, it is well known that the addition of C is required in some alloys to enhance hardness, [19] but elemental C can cause brittleness during composition setting. If C and Ti are added in a certain ratio, they can combine with each other to form into TiC, which acts as a reinforcement ceramic particles and has a beneficial effect by enhancing the strengthening mechanism in alloys. [16,17] Strengthening mechanism by TiC reinforcement particles has been widely studied in different stainless steel alloys, especially 300 and 400 series, [20,21] but not well studied in A286 heatresistant alloys.To enhance the strengthening mechanism at sufficient high temperatures, TiC particles are widely used in the austenite matrix as a reinforcement, [16,17] which can limit the formation of chromium-rich M 23 C 6 -type carbide at grain boundaries, can prevent intergranular stress corrosion, and can increase the tensile and creep strength at both high and low temperatures.

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Homogeneity Study of TiC and η Phases Via Electromagnetic Stirring in Arc-Melted Heat-Resistant A286 Superalloys Varied with Carbon and Titanium Contents

et al. 2022

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Influence of Solid Solution Treatment on the Mechanical Properties of A286 Stainless Steels

Cited by 6 publications

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Carbon and Titanium Effect on Tensile Behavior of Aged A286 Nickel-Iron Based Superalloy

Carbon and Titanium Effect on Tensile Behavior of Aged A286 Nickel-Iron Based Superalloy

Effect of Carbon and Titanium Variations in Fe‐Based Heat‐Resistant Superalloy A286 on TiC and η Phase Formation

Homogeneity Study of TiC and η Phases Via Electromagnetic Stirring in Arc-Melted Heat-Resistant A286 Superalloys Varied with Carbon and Titanium Contents

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