公开(公告)号：US08591674B2

公开(公告)日：2013-11-26

申请号：US13294259

申请日：2011-11-11

Applicant: Sushil Kumar Mishra ,  Shashank Tiwari ,  Asim Tewari ,  Jon T. Carter ,  Deepika Sachdeva

Inventor： Sushil Kumar Mishra ,  Shashank Tiwari ,  Asim Tewari ,  Jon T. Carter ,  Deepika Sachdeva

IPC: C22C23/00 ,  C22C23/02 ,  C22C23/04 ,  C22F1/06

CPC classification number: C22F1/06 ,  B21C37/02 ,  B21H8/005

Abstract: A method of enhancing the ductility of magnesium alloy sheets containing 85% or more by weight of magnesium is described. An annealed, substantially strain free, sheet of generally uniform grain size is locally deformed in local regions to develop strained ‘islands’ of a predetermined strain embedded in a substantially strain-free matrix and then annealed. The deformed regions undergo recrystallization and grain growth while the remainder of the sheet suffers only minor change in grain size, leading to sheet with grains having a bimodal size distribution. The ductility of alloys processed in this way is significantly greater than the ductility of the unprocessed, uniform grain size alloy without compromise to the tensile strength of the alloy.

Abstract translation: 描述了提高含有85重量％以上的镁的镁合金板的延展性的方法。 退火的，基本上不变形的大致均匀晶粒尺寸的片材在局部区域局部变形，以形成嵌入基本无应变基体中的预定应变的应变“岛”，然后退火。 变形区域经历重结晶和晶粒生长，而其余的片材仅受到微小的晶粒尺寸变化，导致具有双峰尺寸分布的晶粒的片材。 以这种方式加工的合金的延展性明显大于未加工的均匀晶粒尺寸合金的延展性，而不损害合金的拉伸强度。

公开(公告)号：US20130253691A1

公开(公告)日：2013-09-26

申请号：US13425356

申请日：2012-03-20

Applicant: Rajesh Raghavan ,  Shashank Tiwari ,  Sushil Kumar Mishra

Inventor： Rajesh Raghavan ,  Shashank Tiwari ,  Sushil Kumar Mishra

IPC: G06F19/00

CPC classification number: G01N23/203 ,  G01N2223/606 ,  G01N2223/615

Abstract: Methods for determining a recovery state of a metal alloy are disclosed herein. In one example, a fluctuation in a crystallographic grain orientation of the metal alloy is determined by utilizing electron backscatter diffraction (EBSD) data of the metal alloy. A processor of an electron backscatter diffraction machine utilizes a local orientation deviation quantifier to correlate the fluctuation in the crystallographic grain orientation of the metal alloy with a plastic strain recovery of the metal alloy. Other examples of the method are also disclosed herein.

Abstract translation: 本文公开了确定金属合金的恢复状态的方法。 在一个实例中，通过利用金属合金的电子反向散射衍射（EBSD）数据来确定金属合金的晶体取向的波动。 电子反向散射衍射机的处理器利用局部取向偏差量词来将金属合金的晶体晶粒取向的波动与金属合金的塑性应变恢复相关联。 本文还公开了该方法的其它实例。

公开(公告)号：US20110030855A1

公开(公告)日：2011-02-10

申请号：US12537297

申请日：2009-08-07

Applicant: Mridula D. Bharadwaj ,  Suresh Sundarraj ,  Shashank Tiwari ,  Aihua A. Luo ,  Deepika Sachdeva

Inventor： Mridula D. Bharadwaj ,  Suresh Sundarraj ,  Shashank Tiwari ,  Aihua A. Luo ,  Deepika Sachdeva

IPC: C22F1/06 ,  C22C23/02

CPC classification number: C22F1/06 ,  C22C23/02

Abstract: A method of improving the corrosion resistance of magnesium alloy castings containing more than about 2 per cent by weight of aluminum is described. The method comprises: first selecting a casting process suitable for developing at least on the surface of the casting a microstructure comprising aluminum-depleted magnesium grains surrounded by an aluminum-rich layer and preferably incorporating at least some of an intermetallic compound based on the composition Mg17Al12; and second, heat treating at least the outer layer of the casting to promote additional intermetallic compound precipitation as required.

Abstract translation: 描述了一种提高镁合金铸件的耐腐蚀性的方法，该铸造件含有超过约2重量％的铝。 该方法包括：首先选择适合于至少在铸件表面上显影的铸造工艺，该显微组织包含由富铝层包围的贫铝镁颗粒，并且优选地基于组合物Mg17Al12掺入至少一些金属间化合物 ; 其次，至少对铸件的外层进行热处理，以根据需要促进附加的金属间化合物沉淀。

公开(公告)号：US09002499B2

公开(公告)日：2015-04-07

申请号：US13425356

申请日：2012-03-20

Applicant: Rajesh Raghavan ,  Shashank Tiwari ,  Sushil Kumar Mishra

Inventor： Rajesh Raghavan ,  Shashank Tiwari ,  Sushil Kumar Mishra

IPC: G06F19/00 ,  G01N23/203

CPC classification number: G01N23/203 ,  G01N2223/606 ,  G01N2223/615

Abstract: Methods for determining a recovery state of a metal alloy are disclosed herein. In one example, a fluctuation in a crystallographic grain orientation of the metal alloy is determined by utilizing electron backscatter diffraction (EBSD) data of the metal alloy. A processor of an electron backscatter diffraction machine utilizes a local orientation deviation quantifier to correlate the fluctuation in the crystallographic grain orientation of the metal alloy with a plastic strain recovery of the metal alloy. Other examples of the method are also disclosed herein.

Abstract translation: 本文公开了确定金属合金的恢复状态的方法。 在一个实例中，通过利用金属合金的电子反向散射衍射（EBSD）数据来确定金属合金的晶体取向的波动。 电子反向散射衍射机的处理器利用局部取向偏差量词来将金属合金的晶体晶粒取向的波动与金属合金的塑性应变恢复相关联。 本文还公开了该方法的其它实例。

公开(公告)号：US20130118657A1

公开(公告)日：2013-05-16

申请号：US13294259

申请日：2011-11-11

Applicant: Sushil Kumar Mishra ,  Shashank Tiwari ,  Asim Tewari ,  Jon T. Carter ,  Deepika Sachdeva

Inventor： Sushil Kumar Mishra ,  Shashank Tiwari ,  Asim Tewari ,  Jon T. Carter ,  Deepika Sachdeva

IPC: C22F1/06 ,  C22C23/00

CPC classification number: C22F1/06 ,  B21C37/02 ,  B21H8/005

Abstract: A method of enhancing the ductility of magnesium alloy sheets containing 85% or more by weight of magnesium is described. An annealed, substantially strain free, sheet of generally uniform grain size is locally deformed in local regions to develop strained ‘islands’ of a predetermined strain embedded in a substantially strain-free matrix and then annealed. The deformed regions undergo recrystallization and grain growth while the remainder of the sheet suffers only minor change in grain size, leading to sheet with grains having a bimodal size distribution. The ductility of alloys processed in this way is significantly greater than the ductility of the unprocessed, uniform grain size alloy without compromise to the tensile strength of the alloy.

Abstract translation: 描述了提高含有85重量％以上的镁的镁合金板的延展性的方法。 退火的，基本上不变形的大致均匀晶粒尺寸的片材在局部区域局部变形，以形成嵌入基本无应变基体中的预定应变的应变“岛”，然后退火。 变形区域经历重结晶和晶粒生长，而其余的片材仅受到微小的晶粒尺寸变化，导致具有双峰尺寸分布的晶粒的片材。 以这种方式加工的合金的延展性明显大于未加工的均匀晶粒尺寸合金的延展性，而不损害合金的拉伸强度。

公开(公告)号：US20110314449A1

公开(公告)日：2011-12-22

申请号：US12855231

申请日：2010-08-12

Applicant: Bhaskar Babu ,  Rohit Kedia ,  Atul Alase ,  John Premkumar ,  Shashank Tiwari ,  Ananth Subramaniam ,  S. Vijay Kumar ,  Arman Saleh ,  Shivakumar Shankaran ,  Prakash Gopan V. ,  Pradeep H. K. ,  Kavitha Natarajan

Inventor： Bhaskar Babu ,  Rohit Kedia ,  Atul Alase ,  John Premkumar ,  Shashank Tiwari ,  Ananth Subramaniam ,  S. Vijay Kumar ,  Arman Saleh ,  Shivakumar Shankaran ,  Prakash Gopan V. ,  Pradeep H. K. ,  Kavitha Natarajan

IPC: G06F9/44

CPC classification number: G06Q10/06 ,  G06F8/70 ,  G06Q10/063

Abstract: The present invention provides a method, a system, and a computer program product for determining an effort associated with the maintenance of software. The method, the system, and the computer program product enable receiving values corresponding to predefined factors, which are segregated into corrective factors, preventive factors, perfective factors, and adaptive factors. A corrective effort is determined based on the corrective factors and predefined rules. Thereafter, a preventive effort is determined based on the preventive factors, the predefined rules, and the corrective effort. Thereafter, a perfective effort is determined based on the perfective factors, the predefined rules, and the corrective effort. Subsequently, an adaptive effort is determined based on the adaptive factors, the predefined rules, the corrective effort, the preventive effort, and the perfective effort. A total effort is then generated based on the corrective effort, the preventive effort, the perfective effort, and the adaptive effort.

Abstract translation: 本发明提供一种用于确定与维护软件相关联的努力的方法，系统和计算机程序产品。 方法，系统和计算机程序产品能够接收与预定因素相对应的值，这些值被分为校正因素，预防因素，完善因素和适应因素。 基于纠正因素和预定义规则确定纠正措施。 此后，基于预防因素，预定义规则和纠正措施确定预防努力。 此后，根据完善因素，预定义规则和纠正措施确定完善的努力。 随后，基于自适应因素，预定义规则，纠正措施，预防努力和完善努力来确定适应性努力。 然后，基于纠正措施，预防努力，完善的努力和适应性努力，产生了总体努力。