Lattice parameter variation and its effect on precipitation behaviour of ordered Ni2(Cr,Mo) phase in Ni-Cr-Mo alloys
Ni-Cr-Mo based superalloys often precipitate out particles of an ordered Ni2(Cr,Mo) phase in the γ-matrix, whose kinetics varies with composition of alloys. Precipitation of the Ni2(Cr,Mo) phase involves a change in the unit cell from cubic to orthorhombic structure. Lattice misfit strains associate...
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| creator | Verma, A. Singh, J.B. Kaushik, S.D. Siruguri, V. |
| description | Ni-Cr-Mo based superalloys often precipitate out particles of an ordered Ni2(Cr,Mo) phase in the γ-matrix, whose kinetics varies with composition of alloys. Precipitation of the Ni2(Cr,Mo) phase involves a change in the unit cell from cubic to orthorhombic structure. Lattice misfit strains associated with such cubic to non-cubic transformations significantly affect precipitation behaviour. In the present work, a series of Ni-Cr-Mo alloys have been investigated in order to study the effect Cr and Mo solutes on lattice parameters of disordered as well as ordered phases, and its manifestation on precipitation behaviour of the Ni2(Cr,Mo) phase. Lattice parameters have been determined on the basis of Rietveld refinement of x-ray and neutron diffraction data obtained from different alloys in solution treated as well as aged conditions. Present results have shown that lattice misfit strains in these alloys increases monotonously with the increase of Mo/Cr ratio, which significantly affects the precipitation behaviour of the ordered Ni2(Cr,Mo) phase.
•Increase of unit cell parameters of ordered Ni2(Cr,Mo) phase and disordered γ-phase in Ni-Cr-Mo alloys with increase of Mo.•Increase in lattice misfit strains with increase in Mo concentration in aged Ni-Cr-Mo alloys.•Significant effect of lattice misfit strains on the precipitation behavior of the ordered Ni2(Cr,Mo) phase. |
| doi_str_mv | 10.1016/j.jallcom.2019.152195 |
| format | Article |
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•Increase of unit cell parameters of ordered Ni2(Cr,Mo) phase and disordered γ-phase in Ni-Cr-Mo alloys with increase of Mo.•Increase in lattice misfit strains with increase in Mo concentration in aged Ni-Cr-Mo alloys.•Significant effect of lattice misfit strains on the precipitation behavior of the ordered Ni2(Cr,Mo) phase.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2019.152195</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Chromium base alloys ; Cubic lattice ; Lattice misfit strain ; Lattice parameters ; Molybdenum ; Neutron diffraction ; Ni-Cr-Mo alloys ; Nickel base alloys ; Ordered Ni2(Cr,Mo) phase ; Phase transitions ; Rietveld refinement ; Superalloys ; Transmission electron microscopy ; Unit cell</subject><ispartof>Journal of alloys and compounds, 2020-01, Vol.813, p.152195, Article 152195</ispartof><rights>2019 Elsevier B.V.</rights><rights>Copyright Elsevier BV Jan 15, 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c252t-ef29b5b09f001f96c28ebc2c26e037ab10cd443a7c004c5bd0d770cfb8033a7d3</citedby><cites>FETCH-LOGICAL-c252t-ef29b5b09f001f96c28ebc2c26e037ab10cd443a7c004c5bd0d770cfb8033a7d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0925838819334413$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Verma, A.</creatorcontrib><creatorcontrib>Singh, J.B.</creatorcontrib><creatorcontrib>Kaushik, S.D.</creatorcontrib><creatorcontrib>Siruguri, V.</creatorcontrib><title>Lattice parameter variation and its effect on precipitation behaviour of ordered Ni2(Cr,Mo) phase in Ni-Cr-Mo alloys</title><title>Journal of alloys and compounds</title><description>Ni-Cr-Mo based superalloys often precipitate out particles of an ordered Ni2(Cr,Mo) phase in the γ-matrix, whose kinetics varies with composition of alloys. Precipitation of the Ni2(Cr,Mo) phase involves a change in the unit cell from cubic to orthorhombic structure. Lattice misfit strains associated with such cubic to non-cubic transformations significantly affect precipitation behaviour. In the present work, a series of Ni-Cr-Mo alloys have been investigated in order to study the effect Cr and Mo solutes on lattice parameters of disordered as well as ordered phases, and its manifestation on precipitation behaviour of the Ni2(Cr,Mo) phase. Lattice parameters have been determined on the basis of Rietveld refinement of x-ray and neutron diffraction data obtained from different alloys in solution treated as well as aged conditions. Present results have shown that lattice misfit strains in these alloys increases monotonously with the increase of Mo/Cr ratio, which significantly affects the precipitation behaviour of the ordered Ni2(Cr,Mo) phase.
•Increase of unit cell parameters of ordered Ni2(Cr,Mo) phase and disordered γ-phase in Ni-Cr-Mo alloys with increase of Mo.•Increase in lattice misfit strains with increase in Mo concentration in aged Ni-Cr-Mo alloys.•Significant effect of lattice misfit strains on the precipitation behavior of the ordered Ni2(Cr,Mo) phase.</description><subject>Chromium base alloys</subject><subject>Cubic lattice</subject><subject>Lattice misfit strain</subject><subject>Lattice parameters</subject><subject>Molybdenum</subject><subject>Neutron diffraction</subject><subject>Ni-Cr-Mo alloys</subject><subject>Nickel base alloys</subject><subject>Ordered Ni2(Cr,Mo) phase</subject><subject>Phase transitions</subject><subject>Rietveld refinement</subject><subject>Superalloys</subject><subject>Transmission electron microscopy</subject><subject>Unit cell</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFkMtKAzEUhoMoWKuPIATcKDhjLp3bSmTwBq1udB0yyQnN0E7GJC307Y1M9y4OB_5z-8-H0DUlOSW0fOjzXm42ym1zRmiT04LRpjhBM1pXPFuUZXOKZqRhRVbzuj5HFyH0hKROTmcoLmWMVgEepZdbiODxXnoro3UDloPGNgYMxoCKOCmjB2VHG6d6B2u5t27nsTPYeQ0eNP6w7Lb19yt3h8e1DIDtkLSs9dnK4eTTHcIlOjNyE-DqmOfo--X5q33Llp-v7-3TMlOsYDEDw5qu6EhjklvTlIrV0CmmWAmEV7KjROnFgstKEbJQRaeJriqiTFcTnlTN5-hm2jt697ODEEWfzA7ppGCcllXFWYo5KqYu5V0IHowYvd1KfxCUiD_AohdHwOIPsJgAp7nHaQ7SC3sLXgRlYVCgbaIUhXb2nw2_uD2HGg</recordid><startdate>20200115</startdate><enddate>20200115</enddate><creator>Verma, A.</creator><creator>Singh, J.B.</creator><creator>Kaushik, S.D.</creator><creator>Siruguri, V.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20200115</creationdate><title>Lattice parameter variation and its effect on precipitation behaviour of ordered Ni2(Cr,Mo) phase in Ni-Cr-Mo alloys</title><author>Verma, A. ; Singh, J.B. ; Kaushik, S.D. ; Siruguri, V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c252t-ef29b5b09f001f96c28ebc2c26e037ab10cd443a7c004c5bd0d770cfb8033a7d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Chromium base alloys</topic><topic>Cubic lattice</topic><topic>Lattice misfit strain</topic><topic>Lattice parameters</topic><topic>Molybdenum</topic><topic>Neutron diffraction</topic><topic>Ni-Cr-Mo alloys</topic><topic>Nickel base alloys</topic><topic>Ordered Ni2(Cr,Mo) phase</topic><topic>Phase transitions</topic><topic>Rietveld refinement</topic><topic>Superalloys</topic><topic>Transmission electron microscopy</topic><topic>Unit cell</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Verma, A.</creatorcontrib><creatorcontrib>Singh, J.B.</creatorcontrib><creatorcontrib>Kaushik, S.D.</creatorcontrib><creatorcontrib>Siruguri, V.</creatorcontrib><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Verma, A.</au><au>Singh, J.B.</au><au>Kaushik, S.D.</au><au>Siruguri, V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Lattice parameter variation and its effect on precipitation behaviour of ordered Ni2(Cr,Mo) phase in Ni-Cr-Mo alloys</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2020-01-15</date><risdate>2020</risdate><volume>813</volume><spage>152195</spage><pages>152195-</pages><artnum>152195</artnum><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>Ni-Cr-Mo based superalloys often precipitate out particles of an ordered Ni2(Cr,Mo) phase in the γ-matrix, whose kinetics varies with composition of alloys. Precipitation of the Ni2(Cr,Mo) phase involves a change in the unit cell from cubic to orthorhombic structure. Lattice misfit strains associated with such cubic to non-cubic transformations significantly affect precipitation behaviour. In the present work, a series of Ni-Cr-Mo alloys have been investigated in order to study the effect Cr and Mo solutes on lattice parameters of disordered as well as ordered phases, and its manifestation on precipitation behaviour of the Ni2(Cr,Mo) phase. Lattice parameters have been determined on the basis of Rietveld refinement of x-ray and neutron diffraction data obtained from different alloys in solution treated as well as aged conditions. Present results have shown that lattice misfit strains in these alloys increases monotonously with the increase of Mo/Cr ratio, which significantly affects the precipitation behaviour of the ordered Ni2(Cr,Mo) phase.
•Increase of unit cell parameters of ordered Ni2(Cr,Mo) phase and disordered γ-phase in Ni-Cr-Mo alloys with increase of Mo.•Increase in lattice misfit strains with increase in Mo concentration in aged Ni-Cr-Mo alloys.•Significant effect of lattice misfit strains on the precipitation behavior of the ordered Ni2(Cr,Mo) phase.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jallcom.2019.152195</doi></addata></record> |
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| subjects | Chromium base alloys Cubic lattice Lattice misfit strain Lattice parameters Molybdenum Neutron diffraction Ni-Cr-Mo alloys Nickel base alloys Ordered Ni2(Cr,Mo) phase Phase transitions Rietveld refinement Superalloys Transmission electron microscopy Unit cell |
| title | Lattice parameter variation and its effect on precipitation behaviour of ordered Ni2(Cr,Mo) phase in Ni-Cr-Mo alloys |
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