DOI: 10.4028/www.scientific.net/msf.482.123. Breakdown of the Schmid Law in BCC Molybdenum Related to the Effect of Shear Stress Perpendicular to the Slip Direction [Penn]

Breakdown of the Schmid Law in BCC Molybdenum Related to the Effect of Shear Stress Perpendicular to the Slip Direction

10.4028/www.scientific.net/msf.482.123

Crossref journal-article

Trans Tech Publications, Ltd.

Materials Science Forum (2457)

Abstract

The breakdown of the Schmid law in bcc metals has been known for a long time. The asymmetry of shearing in the slip direction 〈111〉 in the positive and negative sense, respectively, commonly identified with the twinning-antitwinning asymmetry, is undoubtedly one of the reasons. However, effect of stress components other than the shear stress in the slip direction may be important. In this paper we investigate by atomistic modeling the effect of shear stresses perpendicular to the Burgers vector on the glide of a/2〈111〉 screw dislocations. We show that these shear stresses can significantly elevate or reduce the critical resolved shear stress (CRSS) in the direction of the Burgers vector needed for the dislocation motion, i.e. the Peierls stress. This occurs owing to the changes of the core induced by these stresses. This effect may be the reason why slip systems with smaller Schmid factors may be preferred over that with the largest Schmid factor.

Bibliography

GrÃ¶ger, R., & Vitek, V. (2005). Breakdown of the Schmid Law in BCC Molybdenum Related to the Effect of Shear Stress Perpendicular to the Slip Direction. Materials Science Forum, 482, 123â126.

Authors 2

R. Gröger (first)
V. Vitek (additional)

References 8 Referenced 29

G.I. Taylor and C.F. Elam: Proc. Roy. Soc. A, Vol. 112, No. 761 (1926), p.337. (10.1098/rspa.1926.0116)
J.W. Christian: Metall. Trans. A, Vol. 14 (1983), p.1237. (10.1007/BF02664806)
M.S. Duesbery: Dislocations in Solids, Vol. 8, p.66 (Elsevier Science Publishers, 1989).
M.S. Duesbery and G. Y. Richardson: CRC Critical Reviews in Solid State and Materials Science, Vol. 17 (1991) , p.1. (10.1080/10408439108244630)
V. Vitek: Prog. Mater. Sci., Vol. 36 (1992), p.1. (10.1016/0079-6425(92)90003-P)
M. Mrovec, D. Nguen-Manh, D.G. Pettifor, and V. Vitek: Phys. Rev., in press, (2004).
V. Vitek, M. Mrovec, and J.L. Bassani: Mater. Sci. Eng. A, Vol. 365 (2004), p.31. (10.1016/j.msea.2003.09.004)
V. Vitek, M. Mrovec, R. Gröger, J.L. Bassani, V. Racherla, and L. Yin: Proceedings ICSMA 13, Mater. Sci. Eng., in press, (2004).

Dates

Type	When
Created	16 years, 5 months ago (March 11, 2009, 2:27 p.m.)
Deposited	11 months ago (Oct. 3, 2024, 4:01 p.m.)
Indexed	3 months, 2 weeks ago (May 21, 2025, 5:10 p.m.)
Issued	20 years, 4 months ago (April 15, 2005)
Published	20 years, 4 months ago (April 15, 2005)
Published Online	20 years, 4 months ago (April 15, 2005)

Funders 0

None

BibTeX

@article{Gr_ger_2005, title={Breakdown of the Schmid Law in BCC Molybdenum Related to the Effect of Shear Stress Perpendicular to the Slip Direction}, volume={482}, ISSN={1662-9752}, url={http://dx.doi.org/10.4028/www.scientific.net/msf.482.123}, DOI={10.4028/www.scientific.net/msf.482.123}, journal={Materials Science Forum}, publisher={Trans Tech Publications, Ltd.}, author={Gröger, R. and Vitek, V.}, year={2005}, month=apr, pages={123–126} }

JSON

{
  "indexed": {
    "date-parts": [
      [
        2025,
        5,
        21
      ]
    ],
    "date-time": "2025-05-21T21:10:03Z",
    "timestamp": 1747861803821
  },
  "reference-count": 8,
  "publisher": "Trans Tech Publications, Ltd.",
  "license": [
    {
      "start": {
        "date-parts": [
          [
            2005,
            4,
            15
          ]
        ],
        "date-time": "2005-04-15T00:00:00Z",
        "timestamp": 1113523200000
      },
      "content-version": "vor",
      "delay-in-days": 0,
      "URL": "https://www.scientific.net/PolicyAndEthics/PublishingPolicies"
    },
    {
      "start": {
        "date-parts": [
          [
            2005,
            4,
            15
          ]
        ],
        "date-time": "2005-04-15T00:00:00Z",
        "timestamp": 1113523200000
      },
      "content-version": "tdm",
      "delay-in-days": 0,
      "URL": "https://www.scientific.net/license/TDM_Licenser.pdf"
    }
  ],
  "content-domain": {
    "domain": [],
    "crossmark-restriction": false
  },
  "abstract": "<jats:p>The breakdown of the Schmid law in bcc metals has been known for a long time. The\nasymmetry of shearing in the slip direction \u2329111\u232a in the positive and negative sense, respectively, commonly identified with the twinning-antitwinning asymmetry, is undoubtedly one of the reasons. However, effect of stress components other than the shear stress in the slip direction may be important. In this paper we investigate by atomistic modeling the effect of shear stresses perpendicular to the Burgers vector on the glide of a/2\u2329111\u232a screw dislocations. We show that these shear stresses can significantly elevate or reduce the critical resolved shear stress (CRSS) in the direction of the Burgers vector needed for the dislocation motion, i.e. the Peierls stress. This occurs owing to the changes of the core induced by these stresses. This effect may be the reason why slip systems with smaller Schmid factors may be preferred over that with the largest Schmid factor.</jats:p>",
  "DOI": "10.4028/www.scientific.net/msf.482.123",
  "type": "journal-article",
  "created": {
    "date-parts": [
      [
        2009,
        3,
        11
      ]
    ],
    "date-time": "2009-03-11T18:27:23Z",
    "timestamp": 1236796043000
  },
  "page": "123-126",
  "source": "Crossref",
  "is-referenced-by-count": 29,
  "title": "Breakdown of the Schmid Law in BCC Molybdenum Related to the Effect of Shear Stress Perpendicular to the Slip Direction",
  "prefix": "10.4028",
  "volume": "482",
  "author": [
    {
      "given": "R.",
      "family": "Gr\u00f6ger",
      "sequence": "first",
      "affiliation": [
        {
          "name": "University of Pennsylvania"
        }
      ]
    },
    {
      "given": "V.",
      "family": "Vitek",
      "sequence": "additional",
      "affiliation": [
        {
          "name": "University of Pennsylvania"
        }
      ]
    }
  ],
  "member": "2457",
  "published-online": {
    "date-parts": [
      [
        2005,
        4,
        15
      ]
    ]
  },
  "reference": [
    {
      "key": "3154974",
      "doi-asserted-by": "crossref",
      "unstructured": "G.I. Taylor and C.F. Elam: Proc. Roy. Soc. A, Vol. 112, No. 761 (1926), p.337.",
      "DOI": "10.1098/rspa.1926.0116"
    },
    {
      "key": "3154975",
      "doi-asserted-by": "crossref",
      "unstructured": "J.W. Christian: Metall. Trans. A, Vol. 14 (1983), p.1237.",
      "DOI": "10.1007/BF02664806"
    },
    {
      "key": "3154976",
      "unstructured": "M.S. Duesbery: Dislocations in Solids, Vol. 8, p.66 (Elsevier Science Publishers, 1989)."
    },
    {
      "key": "3154977",
      "doi-asserted-by": "crossref",
      "unstructured": "M.S. Duesbery and G. Y. Richardson: CRC Critical Reviews in Solid State and Materials Science, Vol. 17 (1991) , p.1.",
      "DOI": "10.1080/10408439108244630"
    },
    {
      "key": "3154978",
      "doi-asserted-by": "crossref",
      "unstructured": "V. Vitek: Prog. Mater. Sci., Vol. 36 (1992), p.1.",
      "DOI": "10.1016/0079-6425(92)90003-P"
    },
    {
      "key": "3154979",
      "unstructured": "M. Mrovec, D. Nguen-Manh, D.G. Pettifor, and V. Vitek: Phys. Rev., in press, (2004)."
    },
    {
      "key": "3154980",
      "doi-asserted-by": "crossref",
      "unstructured": "V. Vitek, M. Mrovec, and J.L. Bassani: Mater. Sci. Eng. A, Vol. 365 (2004), p.31.",
      "DOI": "10.1016/j.msea.2003.09.004"
    },
    {
      "key": "3154981",
      "unstructured": "V. Vitek, M. Mrovec, R. Gr\u00f6ger, J.L. Bassani, V. Racherla, and L. Yin: Proceedings ICSMA 13, Mater. Sci. Eng., in press, (2004)."
    }
  ],
  "container-title": "Materials Science Forum",
  "original-title": [],
  "link": [
    {
      "URL": "https://www.scientific.net/MSF.482.123.pdf",
      "content-type": "unspecified",
      "content-version": "vor",
      "intended-application": "similarity-checking"
    }
  ],
  "deposited": {
    "date-parts": [
      [
        2024,
        10,
        3
      ]
    ],
    "date-time": "2024-10-03T20:01:26Z",
    "timestamp": 1727985686000
  },
  "score": 1,
  "resource": {
    "primary": {
      "URL": "https://www.scientific.net/MSF.482.123"
    }
  },
  "subtitle": [],
  "short-title": [],
  "issued": {
    "date-parts": [
      [
        2005,
        4,
        15
      ]
    ]
  },
  "references-count": 8,
  "URL": "http://dx.doi.org/10.4028/www.scientific.net/MSF.482.123",
  "relation": {},
  "ISSN": [
    "1662-9752"
  ],
  "subject": [],
  "container-title-short": "MSF",
  "published": {
    "date-parts": [
      [
        2005,
        4,
        15
      ]
    ]
  }
}