er they have a clear criminal record or not, unless the criminal record involves international travel, such as in drug trafficking.
However, having a passport does not mean you will be allowed to enter another country. Each country gets to decide who can and cannot enter, and nothing done under U.S. law will force them to admit you. Some countries are stricter than others. Canada, for instance, tends to be very strict.
Vacating your conviction and getting a clear criminal record may help, but if you want to know for sure whether you will be allowed into another country, you should contact the consulate of that country or an immigration attorney licensed in that country.